ECAT Pre General Science Physics Chapter 9 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 9 Physical Optics

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

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ECAT Pre General Science Physics Chapter 9 Physical Optics

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Question # 1

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 2

For the virtual image, option _______ is not correct:

Question # 3

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

Question # 4

Light has:

Question # 5

The least distance of distinct vision is:

Question # 6

A prism splits a beam of white light into seven component colors. This is so because

Question # 7

With age, least distance of distinct vision:

Question # 8

The contrast in the fringes in an interference pattern depends upon

Question # 9

Least distance of distinct vision of an old man possibly becomes:

Question # 10

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 11

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

Question # 12

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

Question # 13

Electromagnetic waves transport:

Question # 14

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

Question # 15

Monochromatic light means waves of:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Light appears to travel in straight line because
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
2 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
3 A convex lens acts as diverging lens when the object is placed:
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
4 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
5 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
6 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
7 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real
8 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
9 When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
10 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line

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