Name ____________________________Parent’s Signature ___________________________
Light Study Guide – Test Wednesday 1/9/12
transparent
spectrum
refraction
reflection
opaque
1. Materials that don’t allow light to pass through are opaque.
2. The bending of light as it passes from one material into another is refraction.
3. A range of light waves with different wavelengths is a spectrum.
4.
Reflection is when light strikes a surface and bounces off.
5.
Transparent or Transulucent
materials let light pass through.
Use your Science book to answer each question.
6. How does light travel?
Light travels in straight lines.
7. Sammy is wearing a red sweater, why do you see the color red?
You see the color red because all the colors that make up light are
absorved by the sweater except for red.
8. What color do you see when all of the colors in the visible spectrum are reflected back to
your eye? You see the color white.
9. What color do you see when all of the colors in the visible spectrum are absorbed by an
object? You see the color black.
10. Name the 7 colors that make up light.
Red
Orange
Yellow
Green
Blue
Indigo
Violet
11. Which color has the longest wavelength? Red has the longest wavelength.
12. Which color has the shortest wavelength? Violet has the shortest wavelength.
13. How do you see? Explain the process in 5 steps starting at the source of the light until you
can finally see the object.
1. Reflected light enters your eye
2. The cornea and lens bend the light
3. An image appears in the retina
4. Nerves in your retina send the image to your brain
5. The brain receives the images and turns them upright for you
to
understand
Draw the process you described above.
14. Why do shadows form?
The object blocks the light source and shadows forms where the object
is.
15. What is refraction?
Reflaction occurs when light passes from air into another substance,
like water.