ECAT Pre Engineering Physics Chapter 9 MCQ Test With Answer

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

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

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Physics ECAT Pre Engineering Chapter 9 Physical Optics

00:00
Question # 1

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

Question # 2

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 3

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

Question # 4

Electromagnetic waves transport:

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

The magnifier forms a virtual image of the object at:

Question # 9

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 # 10

A virtual image is formed when object is placed:

Question # 11

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 12

To sources are said to be coherent if they have:

Question # 13

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

Question # 14

The velocity of light in vacuum can be changed by changing

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 If the object is situated at focus of a convex lens, then its image is formed at:
A. F
B. 2F
C. Infinity
D. None of these
2 To see the minor details of the object by microscope, it should have:
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
3 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:
A. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
4 The locus of all the points in the same phase of vibration is called:
A. Wave packet
B. Wave front
C. Wave number
D. None of them
5 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
6 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
7 In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
A. Greater than
B. Equal to
C. Smaller than
D. None of these
8 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
9 A convex lens acts as diverging lens when the object is placed:
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
10 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these

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