Diffraction and diffraction gratings Quiz
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5 questions, one answer each
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1. Which change makes the central maximum of a single-slit pattern wider?
- A. Using a wider slit
- B. Using a shorter wavelength
- C. Using a narrower slit
- D. Moving the lamp further away
2. A grating has 500 lines per mm. What is the slit spacing?
- A. 2.0 × 10⁻⁶ m
- B. 5.0 × 10⁻⁵ m
- C. 5.0 × 10⁵ m
- D. 2.0 × 10⁻³ m
3. Light of wavelength 700 nm is incident normally on a grating with spacing 1.4 × 10⁻⁶ m. What is the angle of the first-order maximum?
- A. 14.5°
- B. 30°
- C. 60°
- D. 45°
4. What is the highest order of maximum for light of wavelength 600 nm on a grating of spacing 2.0 × 10⁻⁶ m?
- A. 3
- B. 2
- C. 4
- D. 5
5. White light passes through a diffraction grating. Which statement is correct about the first-order spectrum?
- A. Red is closest to the central maximum
- B. All colours appear at the same angle
- C. The first order is white
- D. Violet is closest to the central maximum