Wavefront and Huygens' Principle (Laws of reflection and refraction using Huygens principle ) NEET Questions

Physics - Optics

Wavefront and Huygens' Principle (Laws of reflection and refraction using Huygens principle ) MCQ Questions


1.
What is a wavefront?
A.
A surface of constant phase
B.
A locus of points having different phases
C.
A ray of light
D.
A trajectory of moving particles
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ANSWER :
A. A surface of constant phase
2.
Which of the following represents Huygens' principle?
A.
Every point on a wavefront acts as a secondary source
B.
Secondary sources emit waves in backward direction
C.
Wavefronts do not propagate
D.
Wavefronts do not affect propagation
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ANSWER :
A. Every point on a wavefront acts as a secondary source
3.
The secondary wavelets in Huygens' construction propagate with:
A.
The same velocity as the original wave
B.
Higher velocity than original wave
C.
Lower velocity than original wave
D.
Zero velocity
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ANSWER :
A. The same velocity as the original wave
4.
Huygens' principle is applicable to:
A.
Only reflection
B.
Only refraction
C.
Both reflection and refraction
D.
Only diffraction
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ANSWER :
C. Both reflection and refraction
5.
According to Huygens’ principle, light propagates as:

NEET - 2015

A.
Particles
B.
Wavefronts
C.
Photons
D.
Electric pulses
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ANSWER :
B. Wavefronts
6.
The laws of reflection and refraction can be derived using:
A.
Newton's corpuscular theory
B.
Huygens’ principle
C.
Einstein’s photoelectric theory
D.
Bohr’s atomic model
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ANSWER :
B. Huygens’ principle