Bihar Board - Class 12 Physics - Chapter 10: Wave Optics Multiple Choice Questions (MCQs)
For Class 12 Bihar Board, the chapter Wave Optics in Physics focuses on the wave nature of light, covering topics like interference, diffraction, polarization, and Huygens' principle. You can also find the multiple-choice questions that help in mastering these topics and preparing effectively for exams on Vidyakul.
Multiple Choice Question
1. The phenomenon of interference of light is based on the principle of
(A) Polarization of light waves
(B) Dispersion of light waves
(C) Principle of superposition
(D) Huygens principle
Answer: (C) principle of superposition
2. The phenomenon of polarization is based on the fact that
(A) Light waves are longitudinal waves
(B) Light waves are electromagnetic waves
(C) Light waves are transverse electromagnetic waves
(D) None
Answer: (C) light waves are transverse electromagnetic waves
3. The locus of all points which oscillates in phase is called as
(A) Waves
(B) Wavefront
(C) Wavelets
(D) Both (B) and (C)
Answer: (B) wavefront
4. The surface of constant phase is called as
(A) Wavelets
(B) Wave
(C) Wavefront
(D) None
Answer: (C) wavefront
5. The energy of the wave travels in a direction ______ to the wavefront.
(A) Parallel
(B) Perpendicular
(C) Both (A) and (B)
(D) None
Answer: (B) perpendicular
6. If the locus of points which have same amplitude and vibrate in same phase are spheres then it is called as
(A) Spherical wave
(B) Spherical wavefront
(C) Plane wavefront
(D) None
Answer: (B) spherical wavefront
7. At a large distance from the source, a small portion of the sphere can be considered as a plane then it is called as
(A) Plane wavefront
(B) Spherical wavefront
(C) Both (A) and (B)
(D) None
Answer: (A) plane wavefront
8. Each point of the wave front is the source of secondary disturbance and the wavelets originating from these points spread out
(A) In only one direction
(B) In all directions with the speed of wave
(C) In all directions
(D) None
Answer: (B) in all directions with the speed of wave
9. Each point of the wavefront is the source of secondary disturbance and the wavelets originating from these points spread out in all directions with the speed of wave, this is called as
(A) Principle of superposition
(B) Huygens principle
(C) Polarization
(D) None
Answer: (B) Huygens principle
10. When a wave gets refracted into a denser medium the wavelength and speed of propagation decreases but
(A) Frequency increases
(B) Frequency remains same
(C) Frequency also changes
(D) None
Answer: (B) frequency remains same
11. What happens when an angle of incidence of a wave is more than the critical angle?
(A) Internal reflection
(B) Total internal reflection
(C) Total internal refraction
(D) None
Answer: (B) total internal reflection
12. When the source moves away from the observer the frequency as measured by the source will be smaller, this is called as
(A) Interference of light
(B) Doppler effect
(C) Polarization
(D) None
Answer: (B) Doppler effect
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