Science Project (Light)Done By: Xinyi Gao, Svetlana Nistar, Maisa

Lacevic and Dimple H. Sharma

FACTS ABOUT LIGHTLight is the fastest thing in the universe; it

travels at exactly 299 792 458 meters per second so approximately 300 000 000 meters per second or 300 000 km per second.

the distance that light travels (^) is call a light year.

Light from the sun takes 8 minutes to reach the earth.

Light travels in a straight line. We can see objects because light bounces of the

object then enters our eyes. The primary colours of light are: Red, Blue and

Green. The secondary colours of light are: Magenta,

Yellow and Cyan. Light seems white but is made up of the colours

of the rainbow.

OUR AIM

Our main aim was to find out about colour change. We conducted two experiments, one of which we had to do twice using different methods.

The first experiment was to find out if the colours of the rainbow- when moved very fast- will seem white.

The second experiment was conducted twice because we realize that our first method was not going to work. Our aim was to separate a ray of white light into the colours of the rainbow using a prism.

Experiment 1Aim: To see if the if the colours of the rainbow- when moved

very fast- will seem white.Prediction: The colours will seem white when moving very fast.Materials Needed: Sketch pens (colours of the rainbow), Paper, PortableMini Fan, Scissors, Compass, Protractor and a ruler.Method: 1. On the piece of paper draw a big circle (not too big)

using a compass.2. Divide the circle into 7 equalparts using a protractor.

Experiment 1 (Cont.)3. Colour in the parts using the colours of the

rainbow (in order).4. Measure the center circle of the mini fan

using a compass (start from the middle).5. Using that measure, draw a circle on the big

circle (make sure you start from the middle).6. Cut out the big circle.7. Cut out the inner circle.8. Place the big circle on the fan(make sure the

wings are on top of the paper circle.9. Turn the fan on.

Experiment 1 (Cont.)Observation: the colour of the rainbow seemed white.Conclusion: the colours of the rainbow seem white when moved very fast.

Experiment 2Attempt 1

Aim: To separate a ray of white light into the colours of the rainbow using a prism.

Prediction: The ray of white light will be separated into the colours of the rainbow.

Materials Needed: Shoe box, black paint, paint brush, prism and mini torch.

Method: Paint the entire inside of the shoe box black.

2. Wait for it to dry.

Experiment 2 (Cont.)Attempt 1

3. Make one hole on the smaller end and another on the bigger.

4. Place the prism inside the box an close the lid.

5. Place the torch in one hole and look through the other.

6. Keep changing the angle of the prism till you see the rainbow.This is where we stopped as we realized this

was not going to work.

Experiment 2 (Cont.) What we expected out of the

first snaj attempt.

Attempt 2

Aim: To separate a ray of white light into the colours of the rainbow using a prism.

Prediction: The ray of white light will be separated into the colours of the rainbow.

Materials Needed: Prism, Sunlight and Shade.

Experiment 2 (Cont.)Attempt 2

Method: find a spot where there is sunlight and a little shade as well.

2. Stand in front of the shade and point the prism at the sunlight.

3. Keep changing the angles until you get a perfect rainbow.

EXPERIMENT 2 ATTEMPT 2

Best Picture That we

Have

Other Things We LearnedWhile we were researching we also learned

about many other things e.g.,

How we see thingsCan light be bent? how do mirrors reflect light? etc.

How We See ThingsWe are able to see things mainly because of the luminous

sources, which means sources of light. The light from those sources hits an object which then gets reflected in to our eyes, this is basically how we see our surrounding non-luminous objects. Light is transmitted by transparent and translucent objects, like paper, but they get transmitted more in transparent objects.

 The process of how we see all the objects happen when light rays go through the pupil, which is actually a hole at the front of an eye. Then it reaches the retina at the back of the eye where an upside down image of the object is formed, the retina changes light energy into electrical signals known as impulses that travels to the brain along a nerve. Eventually your brain allows you to see the image the right way up.

HOW WE SEE THINGS(IMAGE)

Can Light Be Bent?When light bounces off a mirror, that's

changing the direction of the original ray.We have included an experiment (shown to us

by Mrs. Princy) which helped us the most to understand this.

Aim: To identify whether light can be bent.

Prediction: Light can be bent.

Can Light Be Bent? (Cont.)

Materials Needed: Pins, a board, white paper, glass block, pencil, scale.

Method: 1. Pin the white paper on the board2. Place the glass block on the white paper and

draw an outline of it.3. Draw an incident ray of the glass block on the

white paper on the outline and draw an arrow pointing towards the glass block

4. Put two pins at the front and back of the arrow.

Can Light Be Bent? (Cont.)5. Look through the transparent glass block from

the exact opposite side of the arrow and mark 2 points with another 2 pins which, if you look from that point, forms a straight line with the 2 pins which were previously placed, draw a straight line connecting the pins starting with the outline of the glass block.

6. Take off the glass block from the paper.7. Draw two normals, one for each line you drew,

then join the two opposite lines with another stright line in the outline of the glass block.

Can Light Be Bent? (Cont.)

Observation: We noticed that the two rays at either side of the block weren’t as straight as what we saw through the glass block.

Conclusion: Light can be bent.

HOW CAN LIGHT BE BENT?(Image)

How Do Mirrors Reflect Light?

When light shines onto an object viewed in a mirror, the rays are reflected into the eye. The rays come from a position behind the mirror. The image is the sane size as the object and the same distance from the mirror. In the image, left is right and right becomes left. The angle that the light gets pointed on to the mirror is the same as the angle that gets reflected of the mirror.

THANK YOU!!!! WE HOPE YOU FOUND THIS

INFORMATIVE!!