TNPSC Heat, Light, Sound MCQS Questions | Study Notes - 1
Question: 1
The refractive index of a given piece of transparent quartz is greatest for
(A) Red light
(B) Yellow light
(C) Violet light
(D) Green light
Ans: C
Violet light
Question: 2
Optical fibres are based on
(A) Total internal reflection
(B) Refraction
(C) Scattering
(D) All of these
Ans: A
Total internal reflection
Question: 3
The head mirror used by E.N.T. doctors is
(A) Plano convex
(B) Plane
(C) Concave
(D) Convex
Ans: C
Concave
Question: 4
Which mirror is to be used to obtain a parallel beam of light from a small lamp?
(A) Concave mirror
(B) Plane mirror
(C) Convex mirror
(D) Any one of these
Ans: A
Concave mirror
Question: 5
Angular separation between two colours of the spectrum depends upon
(A) Angle of incidence
(B) Angle of deviation
(C) Size of the prism
(D) All of these
Ans: B
Angle of deviation
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