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

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

Question # 2

In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.

Question # 3

Huygen's theory cannot explain

Question # 4

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

Question # 5

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 # 6

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 # 7

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

Question # 8

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

Question # 9

If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity

Question # 10

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

Question # 11

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

Question # 12

With age, least distance of distinct vision:

Question # 13

A ray passing through optical center of a lens, after refraction:

Question # 14

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

Question # 15

Light waves are:

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The magnifier forms a virtual image of the object at:
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
2 Light waves are:
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
3 The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
A. 1
B. 0.2
C. 2
D. 0.1
4 Huygen's theory cannot explain
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
5 Least distance of distinct vision of an old man possibly becomes:
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
6 Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
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 According to Huygen's principle
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
9 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
10 When the object lies between F and 2F, the image formed by is formed at:
A. Virtual
B. Diminished
C. Erect
D. Real

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