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.
A wavefront is defined as:
A.
A surface where amplitude is maximum
B.
A surface (locus of points) on which all points oscillate in the same phase
C.
A line along which light energy travels
D.
A line perpendicular to the direction of propagation
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ANSWER :
B. A surface (locus of points) on which all points oscillate in the same phase
2.
The direction of propagation of energy of a wave is:
A.
Perpendicular to the wavefront
B.
Random with respect to the wavefront
C.
At 45° to the wavefront
D.
Parallel to the wavefront
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ANSWER :
A. Perpendicular to the wavefront
3.
The speed at which a wavefront advances outward from the source is called:
A.
The amplitude of the wave
B.
The wavelength of the wave
C.
The speed of the wave
D.
The frequency of the wave
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ANSWER :
C. The speed of the wave
4.
The shape of the wavefront produced by a point source emitting waves uniformly in all directions is:
A.
Plane
B.
Elliptical
C.
Spherical
D.
Cylindrical
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ANSWER :
C. Spherical
5.
At a very large distance from a point source, the wavefront appears:
A.
Concave
B.
Cylindrical
C.
Spherical with very large curvature
D.
Plane (a small portion of the spherical wavefront approximates a plane)
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ANSWER :
D. Plane (a small portion of the spherical wavefront approximates a plane)
6.
The shape of the wavefront produced by a linear (line) source is:
A.
Elliptical
B.
Plane
C.
Cylindrical
D.
Spherical
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ANSWER :
C. Cylindrical