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Physics 10 Chapter 3 - Geometrical Optics - 8
1.
An object is placed 6 cm in front of a concave mirror that has focal length of 10 cm. Determine image distance?
a) -1 / 15 cm
b) 1 / 15 cm
c) -15 cm
d) 15 cm
2.
Which mirrors increases the view of observers?
a) Concave mirrors
b) Convex mirrors
c) Parabolic mirrors
d) Converging mirrors
3.
A convex mirror is used to reflect light from an object placed 66 cm in front of the mirror. Its focal length = -46 cm. Find the image distance?
a) 1 / 27 cm
b) -1 / 27 cm
c) -27 cm
d) 27 cm
4.
In a plane mirror, image formed is...............?
a) Magnified
b) Smaller
c) Inverted
d) Virtual
5.
An object 10.0 cm in front of a convex mirror forms an image 5.0 cm behind the mirror. What is the focal length of the mirror?
a) -0.1 cm
b) -10 cm
c) 10 cm
d) 0.1 cm
6.
What is the bending of light called as it passes from one medium to another?
a) Reflection
b) Refraction
c) Diffraction
d) Interference
7.
Bending of pencil in water is due to..................?
a) Diffraction
b) Interference
c) Refraction
d) Reflection
8.
What is the angle called that is made by the incident ray with the normal?
a) Angle of reflection
b) Angle of refraction
c) Angle of diffraction
d) Angle of incidence
9.
What is the process of bending of light called as it passes from air into glass?
a) Reflection of light
b) Refraction of light
c) Diffraction of light
d) Interference of light
10.
What is the process of bending of light called as it passes from glass into air?
a) Diffraction of light
b) Interference of light
c) Refraction of light
d) Reflection of light
11.
In refraction, which of the following changes?
a) Colour of light
b) All of these
c) Speed of light
d) Frequency of light
12.
In refraction, which of the following does not change?
a) (a) Both b and c
b) (b) Frequency of light
c) (d) Speed of light
d) (c) Colour of light
13.
In refraction, which of the following does not change?
a) None of these
b) Colour of light
c) Speed of light
d) Wavelength of light
14.
In refraction, which of the following does not change?
a) Frequency of light
b) Wavelength of light
c) Speed of light
d) None of these
15.
What is the angle called that is made by the refracted ray with the normal?
a) Angle of refraction
b) Angle of diffraction
c) Angle of reflection
d) Angle of incidence
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