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

Wave length of that color as compared to that of violet color is:

Question # 2

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

Question # 3

To see the minor details of the object by microscope, it should have:

Question # 4

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 # 5

Light appears to travel in straight line because

Question # 6

The least distance of distinct vision is:

Question # 7

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

Question # 8

A magnifier gives an image which is:

Question # 9

The distance from eye to near point is taken as:

Question # 10

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

Question # 11

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

Question # 12

Laws of reflection and refraction can also be explained by:

Question # 13

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

Question # 14

The velocity of light in vacuum can be changed by changing

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 For the virtual image, option _______ is not correct:
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
2 A ray passing through optical center of a lens, after refraction:
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
3 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
4 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
5 To sources are said to be coherent if they have:
A. Same amplitude
B. Same wavelength
C. Definite phase relation with each other
D. None of them
6 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
7 In the formula R = N x m for diffraction grating, N denotes:
A. No. of lines/cm
B. No. of lines/meter
C. Total number of lines
D. None of above
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 A magnifier gives an image which is:
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
10 The distance from eye to near point is taken as:
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm

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