Reflection, refraction and diffraction of waves
Grade 11 Science Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
Light of wavelength 660 nm in air enters glass with refractive index 1.2. Its frequency does not change. What is its wavelength in the glass, Bo?
Light of wavelength 700 nm in air enters glass with refractive index 1.4. Its frequency does not change. What is its wavelength in the glass, Esme?
A 500 Hz tone passes from air into water, where sound travels 4.3 times faster. What happens to its wavelength, Jun?
- It stays the same, since the source is the same
- It becomes about 4.3 times shorter
- It becomes about 4.3 times longer
- It becomes about 4.3 times longer and the frequency rises to match
A water wave moves from deep water into shallow water and slows down. Which quantity stays the same, Kira?
- Its speed
- Its frequency
- Its wavelength and its speed
- Its wavelength
A ray hits a plane mirror at 40° to the mirror surface. What is the angle of reflection, measured from the normal, Milo?
- 50°
- 100°
- 40°
- 80°
A ray hits a plane mirror at 25° to the surface. What angle is there between the incoming ray and the reflected ray, Noah?
- 130°
- 25°
- 50°
- 65°
A mirror is turned by 10° while the incoming ray stays fixed. By how much does the reflected ray turn, Pia?
- 10°
- 20°
- 5°
- 40°
Ren stands between two walls and claps. Echoes return after 0.20 s and 0.50 s. Sound travels at 343.3 m/s. How far apart are the walls?
- About 51 m
- About 60 m
- About 240 m
- About 120 m
A boat's sonar pulse returns after 0.080 s in water, where sound travels at 1481 m/s. How deep is the water, Tala?
- About 118 m
- About 30 m
- About 14 m
- About 59 m
An echo is heard separately only if it returns at least 0.10 s after the clap. What is the least distance to the wall in 343.3 m/s air, Zee?
- About 3.4 m
- About 34 m
- About 17 m
- About 8.6 m