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

Question # 2

To observe interference of light, the condition, which must be met with is that the sources must be:

Question # 3

Light waves are:

Question # 4

Huygen's principles states that:

Question # 5

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

Question # 6

The magnifier forms a virtual image of the object at:

Question # 7

Light has:

Question # 8

The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:

Question # 9

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

Question # 10

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

Question # 11

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 # 12

In order to get interference using two light rays

Question # 13

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

Question # 14

In case of point, source of light shape of wavefront is:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
2 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
3 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
4 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
5 A virtual image is formed when object is placed:
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
6 A line which represents the direction of travel of a wave is known as:
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
7 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
8 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
9 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
10 How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all

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