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

The contrast in the fringes in an interference pattern depends upon

Question # 2

The cause of mirage observed in deserts in bright sunlight is due to

Question # 3

For the virtual image, option _______ is not correct:

Question # 4

To sources are said to be coherent if they have:

Question # 5

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

Question # 6

When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:

Question # 7

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

Question # 8

If the object is situated at focus of a convex lens, then its image is formed at:

Question # 9

When a source of light isat very large distance,the shape of wavefront is:

Question # 10

Which one of the following can act approximately as a source of monochromatic light;

Question # 11

In order to get interference using two light rays

Question # 12

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 # 13

The distance from eye to near point is taken as:

Question # 14

The appearance of the colour in the soap (oil) film results from:

Question # 15

A line which represents the direction of travel of a wave is known as:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
2 The magnifier forms a virtual image of the object at:
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
3 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
4 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
5 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
6 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
7 The focal length of convex lens having magnifying power of 5.55 is:
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
8 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
9 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
10 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted

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