ECAT Pre General Science Chapter 9 online mcq test with answers for Physics chapter 9 (Physical Optics)

Online MCQ`s Test For Chapter 9 "ECAT Pre General Science Physics Chapter 9 Physical Optics Online Test"

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ECAT Pre General Science Physics Chapter 9 Physical Optics Online Test

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Question # 1

The image of the tip of a needle is never sharp because of

Polarization of light A
Interference of light B
Diffraction of light C
Reflection of light D

Question # 2

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

R = N/m A
R = m/N B
R = N x m C
None of these D

Question # 3

The velocity of light in vacuum can be changed by changing

Frequency A
Amplitude B
Wavelength C
None of these D

Question # 4

The magnifier forms a virtual image of the object at:

None of these A
Least distance of distinct vision B
Much farther than the least distance C
Both A and B are correct D

Question # 5

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

A little less than 25 cm A
A little more than 25 cm B
Much less than 25 cm C
None of these D

Question # 6

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:

6 x 10^-5rad A
7 x 10^-5rad B
8 x 10^-5rad C
None of these D

Question # 7

Light appears to travel in straight line because

It is not absorbed by the atmosphere A
It is refracted by the atmosphere B
Its wavelength is very small C
Its velocity is very large D

Question # 8

A convex lens acts as diverging lens when the object is placed:

Beyond 2F A
At 2F B
With focal length C
Between F and 2F D

Question # 9

The appearance of the colour in the soap (oil) film results from:

Dispersion A
Interference B
Reflection C
Refraction D

Question # 10

To sources are said to be coherent if they have:

Same amplitude A
Same wavelength B
Definite phase relation with each other C
None of them D

Question # 11

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

Virtual A
Diminished B
Erect C
Real D

Question # 12

For the virtual image, option _______ is not correct:

1/p = 1/f -1/q A
1/f = 1/p -1/q B
1/p=1/p-1/f C
1/p=1/f+1/q D

Question # 13

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

Bright fringesare wider than dark fringes A
Dark fringes are wider than bright fringes B
Both dark and bright fringes are of equal width C
Central fringes are wider than the outer fringes
D

Question # 14

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

Crest A
Trough B
Wavelength C
Wave-front D

Question # 15

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

Monochromatic A
Phase coherent B
Both of above C
None of above D

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ECAT Pre General Science Physics Chapter 9 MCQ Test With Answer for Physics chapter 9 (Physical Optics)

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Online MCQ`s Test For Chapter 9 "ECAT Pre General Science Physics Chapter 9 Physical Optics Online Test"

ECAT Pre General Science Physics Chapter 9 Physical Optics Online Test

The image of the tip of a needle is never sharp because of

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

The velocity of light in vacuum can be changed by changing

The magnifier forms a virtual image of the object at:

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

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:

Light appears to travel in straight line because

A convex lens acts as diverging lens when the object is placed:

The appearance of the colour in the soap (oil) film results from:

To sources are said to be coherent if they have:

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

For the virtual image, option _______ is not correct:

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

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

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

Prepare Complete Set Wise Chapter 9 "ECAT Pre General Science Physics Chapter 9 Physical Optics Online Test" MCQs Online With Answers

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