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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
In order to get interference using two light rays
Question # 2
Resolving power in mth order diffraction for grating is given by:
Question # 3
The focal length of convex lens having magnifying power of 5.55 is:
Question # 4
The contrast in the fringes in an interference pattern depends upon
Question # 5
A virtual image is formed when object is placed:
Question # 6
Light appears to travel in straight line because
Question # 7
The locus of all the points in the same phase of vibration is called:
Question # 8
To see the minor details of the object by microscope, it should have:
Question # 9
Speed of light in vacuum depends upon:
Question # 10
The cause of mirage observed in deserts in bright sunlight is due to
Question # 11
The velocity of light in vacuum can be changed by changing
Question # 12
Light has:
Question # 13
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
Question # 14
Which one of the following can act approximately as a source of monochromatic light;
Question # 15
The ratio of the size of the image to that of object is called:
Top Scorers Of Physics ECAT Pre Engineering Chapter 9 Physical Optics MCQ`s Test
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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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T Tamshi Sohail 21 - Apr - 2024 06 Min 48 Sec 45/60
ECAT Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Wave length of that color as compared to that of violet color is: |
A. Smaller
B. Longer
C. Equal
D. None of these
|
| 2 | A magnifier gives an image which is: |
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
|
| 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
|
| 4 | 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
|
| 5 | 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
|
| 6 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 7 | The least distance of distinct vision is: |
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
|
| 8 | Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength? |
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
|
| 9 | The velocity of light in vacuum can be changed by changing |
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
|
| 10 | Light appears to travel in straight line because |
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
|
Test Questions