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 order to get interference using two light rays

Question # 2

The terms phase difference and path difference are:

Question # 3

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

Question # 4

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:

Question # 5

Wave length of light, on the average, is given by:

Question # 6

Huygen's principles states that:

Question # 7

In case of point, source of light shape of wavefront is:

Question # 8

Light has:

Question # 9

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 # 10

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

Question # 11

The cause of mirage observed in deserts in bright sunlight is due to

Question # 12

In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:

Question # 13

According to Huygen's principle

Question # 14

For the virtual image, option _______ is not correct:

Question # 15

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

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ECAT Physics Chapter 9 Important MCQ's

Sr.# Question Answer
1 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:
A. Double the size
B. Same size
C. Half the size
D. None of these
2 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
3 Which one of the following can act approximately as a source of monochromatic light;
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
4 Laws of reflection and refraction can also be explained by:
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
5 The appearance of the colour in the soap (oil) film results from:
A. Dispersion
B. Interference
C. Reflection
D. Refraction
6 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
7 The wave nature of light was proposed by:
A. Newton
B. Thomas Young
C. Huygen
D. None of these
8 The locus of all points in a medium having same phase of vibration is called
A. Crest
B. Trough
C. Wavelength
D. Wave-front
9 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
10 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

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