C.3 Wave phenomena Quiz
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5 questions, one answer each
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1. A ray in glass (n = 1.50) meets a glass–air boundary at 45°. What happens?
- A. It refracts away from the normal
- B. It refracts towards the normal
- C. It is totally internally reflected
- D. It passes straight through
2. Two coherent sources in phase. Which path difference gives destructive interference?
- A. λ
- B. 1.5λ
- C. 2λ
- D. 3λ
3. HL: A single slit is made narrower. The central maximum:
- A. Becomes narrower
- B. Becomes wider
- C. Stays the same
- D. Disappears
4. HL: A grating has 500 lines per mm. What is d?
- A. 5.0 × 10⁻⁴ m
- B. 2.0 × 10⁻³ m
- C. 2.0 × 10⁻⁶ m
- D. 5.0 × 10⁻⁷ m
5. HL: In a double slit, d = 4b. Which order of fringe is missing?
- A. 2nd
- B. 3rd
- C. 4th
- D. 5th