Reflection of Light(Spherical Mirrors, Morror Formula) NEET Questions

Physics - Optics

Reflection of Light(Spherical Mirrors, Morror Formula) MCQ Questions


1.
According to the laws of reflection, which of the following statements is correct?
A.
The incident ray and reflected ray lie on opposite sides of the surface but in different planes
B.
The angle of incidence is always greater than the angle of reflection
C.
The angle of reflection is measured from the reflecting surface
D.
The angle of incidence equals the angle of reflection, and incident ray, reflected ray and normal lie in the same plane
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ANSWER :
D. The angle of incidence equals the angle of reflection, and incident ray, reflected ray and normal lie in the same plane
2.
For a spherical mirror, the normal at any point on the mirror is along:
A.
The line joining the point of incidence to the pole
B.
The tangent to the mirror at that point
C.
The line joining the point of incidence to the centre of curvature
D.
The principal axis of the mirror
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ANSWER :
C. The line joining the point of incidence to the centre of curvature
3.
The relationship between focal length (f) and radius of curvature (R) of a spherical mirror is:
A.
f = 2R
B.
f = R/4
C.
f = R
D.
f = R/2
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ANSWER :
D. f = R/2
4.
A concave mirror has a radius of curvature of 40 cm. Its focal length is:
A.
40 cm
B.
80 cm
C.
20 cm
D.
10 cm
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ANSWER :
C. 20 cm
5.
A convex mirror has a focal length of 25 cm. The radius of curvature is:
A.
25 cm
B.
12.5 cm
C.
100 cm
D.
50 cm
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ANSWER :
D. 50 cm
6.
An object is placed 30 cm in front of a concave mirror of focal length 20 cm. The image distance is:
A.
-12 cm
B.
-15 cm
C.
+60 cm
D.
-60 cm
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ANSWER :
D. -60 cm