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Physics 10 Chapter 3 - Geometrical Optics - 19
1.
What is used in eyeglasses?
a) Lens
b) Prism
c) Mirror
d) Optical fibre
2.
In which of the following optical devices, lenses are used?
a) All of these
b) Eyeglasses
c) Cameras
d) Microscopes
3.
What is used in microscopes?
a) Lens
b) Mirror
c) Prism
d) Optical fibre
4.
What is used in telescopes?
a) Mirror
b) Prism
c) Optical fibre
d) Lens
5.
In which of the following optical devices, lenses are used?
a) All of these
b) Telescopes
c) Microscopes
d) Projectors
6.
What is used in projectors?
a) Lens
b) Prism
c) Mirror
d) Optical fibre
7.
Which of the following enable millions of people to see clearly and read comfortably?
a) Lens
b) Prism
c) Mirror
d) Optical fibre
8.
What is the lens called which causes the incident parallel rays to converge at a point?
a) Parabolic lens
b) Convex lens
c) Diverging lens
d) Concave lens
9.
What is the lens called which causes the incident parallel rays to converge at a point?
a) Diverging lens
b) Converging lens
c) Parabolic lens
d) Concave lens
10.
How many main types of lenses are there?
a) Five
b) two
c) Three
d) Four
11.
Which of the following statement is CORRECT about convex lens?
a) The lens is thick at the edges
b) The lens converges rays
c) The lens is thin at the centre
d) The lens diverges rays
12.
What is the lens called that is thick at the centre but thin at the edges?
a) Convex lens
b) Parabolic lens
c) Concave lens
d) Diverging lens
13.
Which of the following statement is CORRECT about convex lens?
a) The lens is thin at the centre
b) The lens is thick at the centre
c) The lens is thick at the edges
d) The lens diverges rays
14.
What is the lens called that is thick at the centre but thin at the edges?
a) Concave lens
b) Converging lens
c) Parabolic lens
d) Diverging lens
15.
Which of the following statement is CORRECT about convex lens?
a) The lens diverges rays
b) The lens is thin at the edges
c) The lens is thin at the centre
d) The lens is thick at the edges
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