12.5. Refraction of Mechanical Waves http://www.ck12.org
http://www.youtube.com/watch?v=mH9VwivqjmE
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/70935Follow up questions.
- What causes refraction?
- What doesn’t change during refraction?
Review
Questions
- A laser beam passes through water and enters a glass block at an angle. The ratio of the speed of the wave
in glass to the speed in water is 0.866. If the angle of incidence to the interface is 60◦, what is the angle of
refraction? - A ray of light is traveling from air into glass at an angle of 30. 0 ◦to the normal line. The speed of the light in
air is 3. 00 × 108 m/sand in glass the speed drops to 2. 00 × 108 m/s. What is the angle of refraction? - Which of the following change when a water wave moves across a boundary at an angle between deep water
and shallow water?
a. frequency
b. wavelength
c. speed
d. wave direction
e. period - Which of the following change when a water wave moves across a boundary exactly along the media interface
between deep water and shallow water?
a. frequency
b. wavelength
c. speed
d. wave direction
e. period - The speed of sound is 340 m/s. A particular sound wave has a frequency of 320. Hz.
a. What is the wavelength of this sound in air?
b. If this sound refracts into water where the speed of sound is 4 times faster, what will be the new
wavelength?
c. What will be the new frequency? - When a light ray passes from air into diamond, the angle of incidence is 45. 0 ◦and the angle of refraction is
16. 7 ◦. If the speed of light in air is 3. 00 × 108 m/s, what is the speed of light in diamond?
- refraction:The turning or bending of a wave direction when it passes from one medium to another of different
density.