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

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 # 2

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 # 3

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

Question # 4

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

Question # 5

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

Question # 6

Huygen's principles states that:

Question # 7

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

Question # 8

Monochromatic light means waves of:

Question # 9

Speed of light in vacuum depends upon:

Question # 10

The velocity of light in vacuum can be changed by changing

Question # 11

When a source of light isat very large distance,the shape of wavefront is:

Question # 12

Electromagnetic waves transport:

Question # 13

In order to get interference using two light rays

Question # 14

The magnifier forms a virtual image of the object at:

Question # 15

According to Huygen's principle

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 The property of light which does not change with the nature of the medium is:
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
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 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. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
4 Huygen principle is used to determine:
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
5 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
6 Huygen's principles states that:
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
7 Angle between the ray of light and the corresponding wavefront is:
A. 0°
B. 60°
C. 90°
D. 120°
8 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
9 If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
10 The least distance of distinct vision is:
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm

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