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

Question # 2

Light waves are:

Question # 3

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

Question # 4

Which one of the following phenomenon cannot be explained on the bases of Huygen's theory

Question # 5

Huygen's principles states that:

Question # 6

Monochromatic light means waves of:

Question # 7

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 # 8

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

Question # 9

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

Question # 10

The terms phase difference and path difference are:

Question # 11

The magnifier forms a virtual image of the object at:

Question # 12

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

Question # 13

The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:

Question # 14

According to Huygen's principle

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 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
2 Wave length of light, on the average, is given by:
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
3 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
4 When the object lies between F and 2F, the image formed by is formed at:
A. Real
B. Virtual
C. Diminished
D. Erect
5 A grating with high resolving power can distinguish _______ difference in wavelengths :
A. Smaller
B. Larger
C. Zero
D. None of these
6 A prism splits a beam of white light into seven component colors. This is so because
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
7 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
8 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
9 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
10 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

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