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 600 nm in air enters glass with refractive index 1.5. Its frequency does not change. What is its wavelength in the glass, Ari?
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 water wave moves from deep water into shallow water and slows down. Which quantity stays the same, Kira?
- Its frequency
- Its wavelength and its speed
- Its speed
- Its wavelength
Light passes from air into glass. Which of these changes, Luz?
- Its frequency and its speed, but not its wavelength
- Its speed and its wavelength, but not its frequency
- Its speed alone, while its wavelength stays the same
- Its frequency, but not its speed
A ray hits a plane mirror at 25° to the surface. What angle is there between the incoming ray and the reflected ray, Noah?
- 50°
- 25°
- 130°
- 65°
A mirror is turned by 10° while the incoming ray stays fixed. By how much does the reflected ray turn, Pia?
- 10°
- 5°
- 40°
- 20°
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 240 m
- About 60 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 14 m
- About 30 m
- About 59 m
- About 118 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 34 m
- About 8.6 m
- About 3.4 m
- About 17 m