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

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

Question # 2

The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called

Question # 3

Huygen's theory cannot explain

Question # 4

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

Question # 5

The terms phase difference and path difference are:

Question # 6

A magnifier gives an image which is:

Question # 7

Light has:

Question # 8

The ratio of the size of the image to that of object is called:

Question # 9

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

Question # 10

To sources are said to be coherent if they have:

Question # 11

With age, least distance of distinct vision:

Question # 12

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

Question # 13

The magnifier forms a virtual image of the object at:

Question # 14

In an interference pattern of Young's double slit(YDS) experiment:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Speed of light in vacuum depends upon:
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
2 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
3 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
4 Stars twinkle due to
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
5 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
6 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
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 The terms phase difference and path difference are:
A. Same
B. Different
C. Equal
D. None of these
9 In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
A. Bright
B. Dark
C. Any of A and B
D. None of these
10 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

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