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

A magnifier gives an image which is:

Question # 2

In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:

Question # 3

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

Question # 4

Huygen's principles states that:

Question # 5

Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?

Question # 6

The focal length of convex lens having magnifying power of 5.55 is:

Question # 7

The locus of all the points in the same phase of vibration is called:

Question # 8

Huygen's theory cannot explain

Question # 9

To see the minor details of the object by microscope, it should have:

Question # 10

A virtual image is formed when object is placed:

Question # 11

Conventionally, all the distance p, q, f are measured from _____ of the lens:

Question # 12

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 13

Electromagnetic waves transport:

Question # 14

Light appears to travel in straight line because

Question # 15

Light waves are:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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
2 The cause of mirage observed in deserts in bright sunlight is due to
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
3 Resolving power in mth order diffraction for grating is given by:
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
4 If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
A. Double the size
B. Same size
C. Half the size
D. None of these
5 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
6 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
7 The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
A. Equal to
B. Greater than
C. Smaller than
D. None of these
8 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
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 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these

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