Luminous object: something that produces its own light The Moon is bright only because it reflects...
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Transcript of Luminous object: something that produces its own light The Moon is bright only because it reflects...
![Page 1: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/1.jpg)
luminous object: something that produces its own light
The Moon is bright only because it reflects the Sun’s light. Therefore, theMoon is NOT luminous.
![Page 2: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/2.jpg)
1. Incandescence: light that is emitted from a very hot object
![Page 3: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/3.jpg)
![Page 4: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/4.jpg)
sodium vapour lamps
a) electric discharge
neon lights
2. Luminescence: light that is generated without heating the object
- types:
![Page 5: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/5.jpg)
LEDs(light-emitting diodes)
![Page 6: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/6.jpg)
b) chemiluminescence: light that is produced by a chemical reaction without a rise in temperature
![Page 7: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/7.jpg)
c) bioluminescence: light that is produced by a biochemical reaction in a living organism
![Page 8: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/8.jpg)
and mercury
d) fluorescence: light that is emitted during exposure of the source to ultraviolet (UV) light
compact fluorescent light (CFL) bulbtubular fluorescent light bulb
![Page 9: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/9.jpg)
Uses of Fluorescence
forensic science
black light theatre
fluorescent fish
money
![Page 10: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/10.jpg)
e) phosphorescence: light that is emitted due to exposure of the source to UV light, and that continues to be emitted for some time in the absence of the UV light
![Page 11: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/11.jpg)
Reflection diagram
![Page 12: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/12.jpg)
Characteristics of Images
Size bigger or smallerAttitude upright or invertedLocation closer or fartherType real or virtual
![Page 13: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/13.jpg)
Curved mirrors
![Page 14: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/14.jpg)
Lens and mirror equation
![Page 15: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/15.jpg)
Refraction diagram
![Page 16: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/16.jpg)
Index of refraction
n =c/vC-speed of light in a vacuum 3.0 x 10 8m/s
V-speed of light in medium
![Page 17: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/17.jpg)
Internal reflection
![Page 18: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/18.jpg)
Lenses
![Page 19: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/19.jpg)
Diverging lens
![Page 20: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/20.jpg)
The eye
![Page 21: Luminous object: something that produces its own light The Moon is bright only because it reflects the Suns light. Therefore, the Moon is NOT luminous.](https://reader035.fdocuments.us/reader035/viewer/2022062620/5519e5cf550346443e8b5152/html5/thumbnails/21.jpg)
Colour Theory