# ch 28 physics

The flashcards below were created by user k33m on FreezingBlue Flashcards.

1. Atmosphere refraction makes the daylight hours a bit
longer
2. Refraction causes the bottom of a swimming pool to appear
shallower than it actually is
3. The type of lens that spreads parallel light is a
diverging lens
4. Fermat's principle of least time applies to
both of these
5. A surface that is considered rough for infrared waves may be polished for
6. The law of reflection holds for
both of these
7. When light is refracted, there is a change in its
wavelength
8. The image of the "infinite-far-away" sum produced by a converging lens appears
at the focal point
9. The reason diamonds display many colors is that
different colors of light undergo different changes of speed when traveling inside a diamond
10. The shortest plane mirror in which you can see your entire image is
11. A single raindrop illuminated by sunshine disperses
all the colors of the rainbow.
12. When you look at yourself in a pocket mirror, and then hold the mirror farther away, you see
the same amount of yourself
13. Different colors of light travel at different speeds in a transparent medium. In vacuum, different colors of light travel at
the same speed
14. When a light beam emerges from water into air, the average light speed
increases
15. The incident light ray, the reflected light ray, and the normal between them
lie in the same plane
16. The bending of light as it refracts actually
shorten the time of travel
17. Object and image for a plane mirror lie
equal distances from the mirror
18. The refraction of light in a diamond is greater for
short-wavelength light
19. Star twinkle when seen from the Earth. When seen from the moon, stars
don't twinkle
20. If you wish to spear a fish with a regular spear, you should compensate for refraction between the air and water and throw your spear
below the sighted fish
21. In an optical fiber, light actually
travels in straight-line segments
22. A "burning glass" used to concentrate sunlight in a tiny spot is a
converging lens
 Author: k33m ID: 219455 Card Set: ch 28 physics Updated: 2013-05-13 21:44:52 Tags: physics Folders: Description: practice for exam Show Answers: