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

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

Question # 2

According to Huygen's principle

Question # 3

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

Question # 4

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 # 5

In order to get interference using two light rays

Question # 6

Huygen principle is used to determine:

Question # 7

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:

Question # 8

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

Question # 9

The magnifier forms a virtual image of the object at:

Question # 10

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

Question # 11

With age, least distance of distinct vision:

Question # 12

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

Question # 13

Electromagnetic waves transport:

Question # 14

Light waves are:

Question # 15

The wave nature of light was proposed by:

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Sr. # Question Answer
1 A magnifier gives an image which is:

A. Virtual, inverted

B. Real, erect

C.Virtual, erect

D. Real, inverted

2 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

3 Speed of light in vacuum depends upon:

A. Frequency

B. Wavelength

C.Amplitude

D. None of these

4 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

5 When the object lies between F and 2F, the image formed by is formed at:

A. Real

B. Virtual

C.Diminished

D. Erect

6 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

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

A. Greater than

B. Equal to

C.Smaller than

D. None of these

8 Light has:

A. Wave nature

B. Particle nature

C.Dual nature

D. None of these

9 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

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

A. High magnifying power

B. High resolving power

C.Am objective of larger focal length

D. None of these

11 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

12 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

13 Huygen principle is used to determine:

A. Speed of light

B. Location of wavefront

C.About polarized or unpolarized light

D. None of them

14 The magnifier forms a virtual image of the object at:

A. None of these

B. Least distance of distinct vision

C.Much farther than the least distance

D. Both A and B are correct

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

A. Diffraction

B. Interference

C.Polarization

D. Dispersion

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