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

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Question # 1

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

Question # 2

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 # 3

A prism splits a beam of white light into seven component colors. This is so because

Question # 4

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

Question # 5

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

Question # 6

A convex lens acts as diverging lens when the object is placed:

Question # 7

Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:

Question # 8

To sources are said to be coherent if they have:

Question # 9

Light appears to travel in straight line because

Question # 10

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

Question # 11

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

Question # 12

Electromagnetic waves transport:

Question # 13

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

Question # 14

The magnifier forms a virtual image of the object at:

Question # 15

A magnifier gives an image which is:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
2 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
3 Conventionally, all the distance p, q, f are measured from _____ of the lens:
A. Focus
B. Optical center
C. Edges
D. None of these
4 In order to get interference using two light rays
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
5 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
6 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
7 Electromagnetic waves transport:
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
8 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Larger
B. Zero
C. None of these
D. Smaller
9 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
10 The size of the image is maximum when its distance from the magnifying glass is:
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m

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