C.3 Wave phenomena Quiz
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5 questions, one answer each
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1. Light passes from air into glass. Which quantity stays the same?
- A. Speed
- B. Wavelength
- C. Frequency
- D. Direction
2. Glass has refractive index 1.50. What is the critical angle for a glass–air boundary?
- A. 30.0°
- B. 41.8°
- C. 48.2°
- D. 56.3°
3. Two coherent sources in phase. At a point where the path difference is 2.5λ, the waves:
- A. Interfere constructively
- B. Interfere destructively
- C. Do not superpose
- D. Produce a standing wave
4. In a double-slit experiment the slit separation is halved. The fringe separation:
- A. Halves
- B. Stays the same
- C. Doubles
- D. Quadruples
5. A wave diffracts most through a gap that is:
- A. Much wider than the wavelength
- B. About the same width as the wavelength
- C. Filled with a denser medium
- D. Shaped as a lens