2nd Year Physics Chapter 4 Test18. Diffraction and Interference

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Intensity of light depends upon:
   1. Wavelength
   2. Amplitude
   3. Velocity
   4. Frequency
2. What is a key criticism of the Many-Worlds interpretation?
   1. It relies on the collapse of the wave function.
   2. It denies the existence of superposition.
   3. It contradicts classical physics entirely.
   4. It is difficult to test experimentally.
3. A diffraction grating separates white light into its constituent colors because:
   1. It absorbs certain colors.
   2. It reflects different colors at different angles.
   3. It diffracts different colors at different angles.
   4. It refracts different colors at different angles.
4. What is a key criticism of the Many-Worlds interpretation?
   1. It relies on the collapse of the wave function.
   2. It is difficult to test experimentally.
   3. It denies the existence of superposition.
   4. It contradicts classical physics entirely.
5. If 5000 lines per centimeter are ruled on a diffraction grating, then the slit spacing will be:
   1. 5×10−3 A˚
   2. 2×10−4 A˚
   3. 2×104 A˚
   4. 0.02 m
6. Two speakers emitting sound waves of the same frequency produce loud and quiet regions due to:
   1. Reflection
   2. Interference
   3. Diffraction
   4. Doppler effect
7. Formula for fringe spacing is:
   1. λd/L
   2. λL/d
   3. Ld/λ
   4. mλL/d
8. When light travels through a narrow slit, it bends slightly around the edges. This phenomenon is called:
   1. Reflection
   2. Refraction
   3. Diffraction
   4. Dispersion
9. What is the longest wavelength of light passing through a single slit of width 1.20 μm for which there is a first-order minimum?
   1. 1.04 μm
   2. 0.849 μm
   3. 0.600 μm
   4. 2.40 μm
10. The distance between two adjacent slits in a diffraction grating is called
    1. Grating constant
    2. Grating spacing
    3. Grating element
    4. Grating pitch