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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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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 9 Physical Optics
00:00
Question # 1
Light has:
Question # 2
In order to get interference using two light rays
Question # 3
Conventionally, all the distance p, q, f are measured from _____ of the lens:
Question # 4
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 5
Speed of light in vacuum depends upon:
Question # 6
Angle between the ray of light and the corresponding wavefront is:
Question # 7
The appearance of the colour in the soap (oil) film results from:
Question # 8
The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
Question # 9
Resolving power in mth order diffraction for grating is given by:
Question # 10
Wave length of light, on the average, is given by:
Question # 11
The property of light which does not change with the nature of the medium is:
Question # 12
In the formula R = N x m for diffraction grating, N denotes:
Question # 13
Stars twinkle due to
Question # 14
In an interference pattern of Young's double slit(YDS) experiment:
Question # 15
Huygen's principles states that:
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F Farzand Shah Farzand Shah 17 - Apr - 2024 01 Min 00 Sec 60/60 -
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U Umarkhan35429@gmail.com Khan 04 - May - 2024 05 Min 00 Sec 60/60 -
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ECAT Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | A convex lens acts as diverging lens when the object is placed: |
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
|
| 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 | How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper: |
A. The upper half of the image is cut off
B. The brightness of the image is reduced
C. The brightness of the image is increased
D. No effect at all
|
| 4 | 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
|
| 5 | 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
|
| 6 | Resolving power in mth order diffraction for grating is given by: |
A. R = N x m
B. None of these
C. R = m/N
D. R = N/m
|
| 7 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 8 | The distance from eye to near point is taken as: |
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
|
| 9 | Wave length of that color as compared to that of violet color is: |
A. Smaller
B. Longer
C. Equal
D. None of these
|
| 10 | Which one of the following phenomenon cannot be explained on the bases of Huygen's theory |
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
|
Test Questions