Download Light Test Study Guide Answer Key Name: Date: Core: Directions

Light Test Study Guide
Answer Key
Name:
Date:
Core:
Directions: Complete the Study Guide for the test.
1. What is the cornea of your eye?
Answer: The clear window in the front of the eye.
2. How are Earthquake, Sound, and Light Waves alike?
Answer: They transmit energy.
3. What shape is a mirror that reflects light rays toward a focal point?
Answer: Concave
4. What is the relationship between eyesight and light?
Answer: Light reflects off an object and then enters the eye, allowing people to see the
objects.
5. Which best explains the relationship between the electromagnetic spectrum and sight?
Answer: Visible Light is the part of the electromagnetic spectrum that can be seen with the
eye.
6. What happens when thicker strings are added to a guitar?
Answer: It changes the vibrations made by the guitar.
7. What is the Law of Reflection?
Answer: A light ray strikes a mirror and bounces off the mirror at the same angle it hits.
8. What best describes the relationship between the speed of sound and the medium through
which it passes?
Answer: Sound travels slower in air because of the increased distance in air particles.
9. What happens to a pupil in bright light?
Answer: The pupil constricts as controlled by the iris.
10. What part of the eye helps you focus on an image?
Answer: The lens helps your eye focus on an image.
11. Is visible light a part of the Electromagnetic Spectrum?
Answer: Yes
12. What type of wave is a light wave?
Answer: A light wave is a transverse wave.
13. What is t he study of visible light called?
Answer: Optics
14. What was the first optical instrument?
Answer: Telescope
15. What is an ophthalmologist?
Answer: An ophthalmologist is a medical doctor. He can perform eye surgery and write
prescriptions.
16. What is an optometrist?
Answer: An optometrist is not a medical doctor. He can see write prescriptions for eyeglasses
and contact lenses.
17. What do opticians do?
Answer: Opticians are technicians trained to design, verify and fit eyeglass lenses and frames,
contact lenses, and other devices to correct eyesight.
18. What are some signs or risk factors for eye diseases?
Answer: High Blood, Diabetes, HIV or Aids, Blurred Vision etc.
19. What are some examples of optical tools?
Answer: Microscopes, Telescopes, Cameras, and Lasers
20. What is an Optical Illusion?
Answer: An optical illusion can use color, light and patterns to create images that can be
deceptive or misleading to our brains.
21. What lens would correct a nearsighted eye?
Answer: Concave
22. What lens would correct a farsighted eye?
Answer: Convex
23. What is the size and shape of the eye?
Answer: The eye is 2.5 cm. in length, and about 7 grams and is shaped roughly like a ball.
24. What is normal vision?
Answer: Normal vision is 20/20.
Essay Questions:
1. What is the difference between nearsightedness and farsightedness?
Answer: Nearsightedness also known as myopia, is a common type of refractive error where
close objects appear clearly, but distant objects appear blurry.
Farsightedness, also known as hyperopia is a common type of refractive error where distant
objects may be seen more clearly than objects that are near.
2. What is the difference between a light wave and a sound wave?
Answer: A light wave is a transverse wave and a sound wave is a longitudinal wave.
3. What is an Optical Illusion?
Answer: An Optical Illusion can use color, light and patterns to create images that can be
deceptive to our brains.