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Physics 10 Chapter 3 - Geometrical Optics - 14
1.
Which of the following are the types of concave lens?
a) All of these
b) Concavo-convex
c) Plano- concave
d) Double- concave
2.
What is the line called that passes through the two centres of curvatures of the lens?
a) Focal point
b) Principle focus
c) Radius of curvature
d) Principle axis
3.
What is the point on the principle axis called that is at the centre of the lens?
a) Focal point
b) Radius of curvature
c) Optical centre
d) Principle focus
4.
What is the point called at which light rays travelling parallel to the principle axis of a convex lens after refraction meet?
a) Principle focus
b) Principle axis
c) Optical centre
d) Radius of curvature
5.
What is the point called at which light rays travelling parallel to the principle axis of a convex lens after refraction meet?
a) Principle axis
b) Optical centre
c) Focal point
d) Radius of curvature
6.
What is the point called from which light rays travelling parallel to the principle axis of a concave lens after refraction appear to come from?
a) Principle focus
b) Principle axis
c) Optical centre
d) Radius of curvature
7.
What is the point called from which light rays travelling parallel to the principle axis of a concave lens after refraction appear to come from?
a) Principle axis
b) Radius of curvature
c) Optical centre
d) Focal point
8.
What is the other name of concave lens?
a) Parabolic lens
b) Diverging lens
c) Convex lens
d) Converging lens
9.
Which of the following lens is also called converging lens?
a) Concave lens
b) Parabolic lens
c) Convex lens
d) Concavo-convex lens
10.
What is the other name of convex lens?
a) Converging lens
b) Diverging lens
c) Convex lens
d) Parabolic lens
11.
Which of the following lens is also called diverging lens?
a) Concavo-convex lens
b) Parabolic lens
c) Concave lens
d) Convex lens
12.
What is the distance between optical centre and the principle axis called?
a) Focal length
b) Radius of curvature
c) Principle axis
d) Optical centre
13.
Which lens spread light rays away from the principal axis of the lens after refraction?
a) Parabolic lens
b) Concave lens
c) Converging lens
d) Convex lens
14.
Which lens bends light rays towards the principal axis of the lens after refraction?
a) Parabolic lens
b) Converging lens
c) Concave lens
d) Convex lens
15.
Which lens bends light rays towards the thickest part (centre) of the lens after refraction?
a) Parabolic lens
b) Convex lens
c) Converging lens
d) Concave lens
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