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 placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:

Question # 2

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

Question # 3

The velocity of light in vacuum can be changed by changing

Question # 4

The property of light which does not change with the nature of the medium is:

Question # 5

The size of the image is maximum when its distance from the magnifying glass is:

Question # 6

Electromagnetic waves transport:

Question # 7

Angle between the ray of light and the corresponding wavefront is:

Question # 8

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

Question # 9

To sources are said to be coherent if they have:

Question # 10

A magnifier gives an image which is:

Question # 11

The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.

Question # 12

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

Question # 13

Light waves are:

Question # 14

The magnifier forms a virtual image of the object at:

Question # 15

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:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
2 Wave length of that color as compared to that of violet color is:
A. Smaller
B. Longer
C. Equal
D. None of these
3 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
4 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
5 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
6 The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
A. Diffraction
B. Interference
C. Polarization
D. Dispersion
7 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
8 The velocity of light in vacuum can be changed by changing
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
9 Light has:
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
10 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

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