ECAT Pre Computer Science Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 9 Physical Optics

Try The MCQ's Test For ECAT Physics Chapter 9 Physical Optics

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ECAT Physics Chapter 9 Physical Optics

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Question # 1

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 2

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 3

Speed of light in vacuum depends upon:

Question # 4

Resolving power in mth order diffraction for grating is given by:

Question # 5

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 6

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 7

The locus of all points in a medium having same phase of vibration is called

Question # 8

If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at:

Question # 9

Wave length of light, on the average, is given by:

Question # 10

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 11

In the formula R = N x m for diffraction grating, N denotes:

Question # 12

Angle between the ray of light and the corresponding wavefront is:

Question # 13

Light appears to travel in straight line because

Question # 14

When the object lies between F and 2F, the image formed by is formed at:

Question # 15

For the virtual image, option _______ is not correct:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
2 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
3 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
4 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
5 If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
6 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
7 Resolving power in mth order diffraction for grating is given by:
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
8 The ratio of the size of the image to that of object is called:
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
9 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
10 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens

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