The document discusses refraction and how it causes the bending of light. When light passes from one medium to another with a different speed, it changes direction. This is demonstrated through experiments with prisms, soap bubbles, CDs, and spoons in water. A prism separates white light into the visible color spectrum through refraction. Longer wavelengths like red bend the least and shorter wavelengths like blue or violet bend the most. The sky appears blue because air scatters shorter blue wavelengths of sunlight more than longer red wavelengths.

2. Making Our Own Rainbow
 First we will shine a light through a glass prism. What
do you see on the wall?
 Next, we will shine a light on soap bubbles, what do
you see now?
 Now, we will shine a light on a CD, now what do you
see?

3. How Did Your Observations Differ
in Each Case?
 Let’s answer this question together
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4. Refraction?
 Refraction is where light waves bend.
 If a light wave moves from one material to another, its
speed changes.
 That change of speed makes the light bend or be
refracted.

5. Index of Refraction
 The bending of the light caused by the different speeds
of light in a certain material is different in which kind
of material it is.
 If the speed of light from one material to another is a
big difference, the more the light will be bent as it
passes at an angle from one material to another.

6. Index of refraction
 Index of refraction: a property of the material that
indicates how much it reduces the speed of light.
 The larger the index of refraction, the more light is
slowed down in that material.
 Eyeglasses, binoculars, cameras, microscopes are all
devices that form images using refraction

7. Spoon in Water
 Put your spoon in the glass of water
 Watch as you put the spoon in the water, look from the
side of the glass.
 What did you see?
 What happened as you put the spoon in the water?

8. Bent Spoon
 Why did the spoon look or appear as if it
was bent when we put the spoon in the
water?
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9. Prisms
 Remember our prism in the beginning of class,
what appeared on the wall?
 A rainbow!!!
 This bending of light occurs because it is
dependent on the wavelength of the light.
 Long waves length are in the red colors and shorter
waves are in the blue or violet colors.
 White light, like the sun, is made up of a bunch of
wavelength or colors.

10. How Prisms Work
 White light (sunlight) passes through the prism.
 The prism then refracts (bends) the light twice
 Once when it passes through the prism, the other time is
when it leaves the prism and reenters the air.
 Longer wavelength refract (bend) less than the short
ones. That is how different colors are separated after
they come out of the prism.

11. Prisms
 Which color of light do you expect to bend the most?
the least?
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 Draw your own prism with the white light coming
through and colors coming out from the other end.
 Next to your picture, explain what is happening.

12. Why is the Sky Blue?
 Let’s try and answer this question think
about the wavelength and colors of the
rainbow.
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13. Why is the Sky Blue?
 http://www.sciencemadesimple.com/sky_blue.html
 Now let’s put our correct answers on our page
 http://www.wallwisher.com/wall/MLphysci4