Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.
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Transcript of Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.
![Page 1: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/1.jpg)
![Page 2: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/2.jpg)
![Page 3: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/3.jpg)
Convex lens Thicker central part
P.66
![Page 4: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/4.jpg)
Concave lens Thinner central part
P.66
![Page 5: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/5.jpg)
Cylindrical convex lens
Convex in 1 direction only
P.66
![Page 6: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/6.jpg)
Cylindrical concave lens
Concave in 1 direction only
P.66
![Page 7: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/7.jpg)
Convex lens
Concave lens
Converging lens
Diverging lens
Light rays are converged
Light rays are diverged
P.66
![Page 8: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/8.jpg)
Light ray bendstowards normalwhen it travelsfrom less densemedium todenser medium
Light ray bendsaway from normalwhen it travelsfrom denser mediumto less dense medium
P.66
![Page 9: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/9.jpg)
Light ray bendstowards normalwhen it travelsfrom less densemedium todenser medium
Light ray bendsaway fromnormal when ittravels fromdenser mediumto less densemedium
P.66
![Page 10: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/10.jpg)
CF F’2F 2F’
f
P.66
![Page 11: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/11.jpg)
CF F’2F 2F’
f
P.66
![Page 12: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/12.jpg)
Compare f and f’
P.66
![Page 13: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/13.jpg)
P.66
![Page 14: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/14.jpg)
P.67
![Page 15: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/15.jpg)
Locate the image ofa distant object
f = separation between the lens & screen
P.67
![Page 16: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/16.jpg)
fP.67
![Page 17: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/17.jpg)
Image is inverted
Same size
u = v
P.67
![Page 18: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/18.jpg)
fP.67
![Page 19: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/19.jpg)
P.68
![Page 21: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/21.jpg)
P.68
![Page 22: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/22.jpg)
P.68
![Page 23: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/23.jpg)
Focal length f
Thin lens
Thick lens
Refractive index n
Radii of curvature
Long focal length
Short focal length
P.68
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C
Light ray passes straightthrough the optical centre
P.68 Rule 1
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C
Light ray passes straightthrough the optical centre
P.68 Rule 1
![Page 26: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/26.jpg)
F
P.68 Rule 2
![Page 27: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/27.jpg)
F
P.68 Rule 2
![Page 28: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/28.jpg)
F
P.68 Rule 3
![Page 29: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/29.jpg)
F’F
P.68 Rule 3
![Page 30: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/30.jpg)
P.69
Concave Lens
Diverging
X
X
X
X
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P.69
Rule 2Correct
Diverging
Rule 3Correct
Rule 3 Correct
Correct
ConvergingIncorrect
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Experiment : Construction rulesP.69
![Page 33: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/33.jpg)
Object O
F F’
Any 2 light rays from construction rules
Image I
Solid lines denote real light ray & real image
P.69
![Page 34: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/34.jpg)
Object O
F F’
Any 2 light rays from construction rules
Dotted lines denote line extended & virtual image
Image I
P.69
![Page 35: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/35.jpg)
P.69
![Page 36: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/36.jpg)
Object O
F F’
Image I
P.69 Q1
![Page 37: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/37.jpg)
P.69
![Page 38: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/38.jpg)
F F’
O
I
P.69
Can find the location of the image
![Page 39: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/39.jpg)
F F’
O
I
P.69
Can find the location of the object
![Page 40: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/40.jpg)
O
I
P.69
Can find the location of lens
![Page 41: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/41.jpg)
Ray diagram
Object Image Focal length
Any 2 3rd
P.69
![Page 42: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/42.jpg)
P.70
![Page 43: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/43.jpg)
F F’
I
u = Object at infinity is representedby a set of parallel light rays
ImageReal
Inverted
Diminished v = f
P.70
![Page 44: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/44.jpg)
P.70
![Page 45: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/45.jpg)
P.70
![Page 46: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/46.jpg)
I
u > 2f
O
F F’2F 2F’
Image2f > v > f
Real
Inverted
Diminished
P.70
![Page 47: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/47.jpg)
P.70
![Page 48: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/48.jpg)
P.70
![Page 49: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/49.jpg)
I
u = 2f
Same size
O
F F’2F
2F’
v = 2fImage
Real
Inverted
P.70
![Page 50: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/50.jpg)
P.70
![Page 51: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/51.jpg)
I
2f > u > f
Enlarged
O
F F’2F 2F’
v > 2fImage
Real
Inverted
P.70
![Page 53: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/53.jpg)
F F’
u = f
v =
O
ImageReal
Inverted
Image at infinityis representedby a set of parallellight rays
P.70
![Page 54: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/54.jpg)
P.70
![Page 55: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/55.jpg)
Iu < f
Virtual Upright
O
F F’2F 2F’
Same sideEnlargedImage
P.70
![Page 56: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/56.jpg)
P.70
![Page 57: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/57.jpg)
P.70
![Page 58: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/58.jpg)
Object
Image
Infinity
F
Real
Inverted
Diminished
Same size
Enlarged
2F F
2F Infinity
P.70
![Page 59: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/59.jpg)
F
Object
Image Virtual Erect Same side
Enlarged
Optical centre
Infinity Optical centre
Same size
P.70
![Page 60: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/60.jpg)
F F’
I
ImageReal
Inverted
Diminished v = f
P.71 Q1
![Page 61: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/61.jpg)
I
Enlarged
O
F F’2F 2F’
v > 2fImage
Real
Inverted
P.71 Q1
![Page 62: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/62.jpg)
P.71
Diverging
Bends towards normal
![Page 63: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/63.jpg)
F F’
I
O
Same side& betweenC & F
Virtual UprightImage
Diminished
P.72
![Page 64: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/64.jpg)
P.72
![Page 65: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/65.jpg)
P.72
![Page 66: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/66.jpg)
F
Object
Image
Optical centreInfinity
Optical centre
Virtual Erect Same side
Diminished Same size
P.72
![Page 67: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/67.jpg)
P.72 Q1
Diverging
Light can pass through it
Must be Lens
![Page 68: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/68.jpg)
P.72 Q2
Concave Lens
Virtual Image
X X
Only 2 rays from tip
X
![Page 69: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/69.jpg)
P.73 Q3
Erect
Diminished(1 mark)
Concave Lens(1 mark)
![Page 70: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/70.jpg)
F F’
I
O
Same side& betweenC & F
Virtual UprightImage
Diminished
P.73 Q3
![Page 71: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/71.jpg)
Experiment : Image formation using light raysP.73
![Page 72: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/72.jpg)
Ray diagram
Position of image
Size of image
Nature of image
P.73
![Page 74: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/74.jpg)
I
O
F F’2F 2F’
P.73
![Page 75: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/75.jpg)
F F’
O
I
Scale
P.73
![Page 76: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/76.jpg)
P.74 Q1
![Page 77: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/77.jpg)
P.74 Q1
I
Same size v = 2fImage
Real
Inverted
f= 15 cm
![Page 78: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/78.jpg)
I
hi
O
ho
u
v
h
hmo
iu
v
P.74 Magnification
![Page 79: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/79.jpg)
I
O
F F’2F
2F’
P.74
![Page 80: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/80.jpg)
F F’
I
O
P.74
![Page 81: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/81.jpg)
u
v
u = v
2f
fvu
111
f>0, convex lens
f<0, concave lens
v>0, real image
v<0, virtual image
![Page 82: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/82.jpg)
P.75 Q1
Real Image
(1) is correct
(2) is correct
(3) is incorrect
Only inverted
![Page 83: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/83.jpg)
Real &invertedimage
RR
P.75 Q1
![Page 84: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/84.jpg)
P.75 Q2
Convex lens Real image, on the other side
J
![Page 85: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/85.jpg)
P.75 Q2
36 cm
m=v/u= 36/18= 2
![Page 86: Convex lens Thicker central part P.66 Concave lens Thinner central part P.66.](https://reader038.fdocuments.us/reader038/viewer/2022103023/56649d8c5503460f94a73c65/html5/thumbnails/86.jpg)
P.75 Q2
24 cm
u=v=2 f
f = 12 cm
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P.76 Q2
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P.76 Q2
Magnifying glass
It cannot. The image is virtual.
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P.76 Q3
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P.76 Q3
I
u =30 cm v =7.5 cm
m =v / u = 7.5 / 30 = 0.25
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P.76 Q3
Convex lens will form inverted, real image when the object is placed beyond the focal length of the lens. The visitor cannot be easily identified.
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P.77 Q3
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P.77 Q3
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P.77 Q3(c)(i)
I
Image is outside the shaded region
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P.77 Q3
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P.77 Q3(c)(ii)
I
f=5.5 cm
I
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P.78 Q2
Real Image Virtual Image
Virtual Image
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P.78 Q3
Can you see Virtual Image?
Yes
Camera acts as your eyes
False
This is real image
Image should be formed on film
True
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P.79 Q4
Real Image
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Enlarged, erect & virtual image
Magnifying glass is convex lens
P.79
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P.79
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I
O
F F’2F 2F’
The magnification ismaximum when the objectis close to the focus
P.79
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P.79 Q2
Converge light ray Convex lens
Convex lens Concave mirror (out of syllabus)
Convex lens
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P.79 Q3
out of syllabus
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P.80 Q4
X Convex lensVirtual, under the lensX
u < f to have magnified virtual imageX
D) v>u to have magnified virtual image
X
I
O
F F’2F 2F’
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P.80 Q5
True False
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P.80 Q6
F F’I
XYesYes
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P.80 Q8
XMagnified image by convex lens
YesYes
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P.80 Q11
Yes Magnifying glass
YesYes