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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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Total Questions15
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Time Allowed20
ECAT Physics Chapter 9 Physical Optics
00:00
Question # 1
Resolving power in mth order diffraction for grating is given by:
Question # 2
The contrast in the fringes in an interference pattern depends upon
Question # 3
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 4
A convex lens acts as diverging lens when the object is placed:
Question # 5
The terms phase difference and path difference are:
Question # 6
The distance from eye to near point is taken as:
Question # 7
The velocity of light in vacuum can be changed by changing
Question # 8
Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
Question # 9
A ray passing through optical center of a lens, after refraction:
Question # 10
According to Huygen's principle
Question # 11
The magnifier forms a virtual image of the object at:
Question # 12
The size of the image is maximum when its distance from the magnifying glass is:
Question # 13
The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
Question # 14
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
Question # 15
The focal length of convex lens having magnifying power of 5.55 is:
Top Scorers Of ECAT Physics Chapter 9 Physical Optics MCQ`s Test
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H Heer 21 - Jan - 2024 00 Min 29 Sec 60/60 -
H Hamza Mukhtair 19 - Jul - 2022 00 Min 49 Sec 60/60 -
V Vertex Gaming 16 - Jul - 2024 00 Min 47 Sec 55/60 -
T Tasser Haider 31 - May - 2024 01 Min 13 Sec 50/60 -
M Maham Mehar 31 - Jul - 2024 02 Min 42 Sec 50/60 -
M Manoush Fatima 31 - May - 2024 03 Min 21 Sec 50/60 -
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M Muhammad Hashim 02 - Jun - 2024 02 Min 01 Sec 45/60 -
A Ayan Shuaib 29 - Jan - 2024 02 Min 23 Sec 45/60 -
M Muhammad Abdur.Rahman Khan 30 - Aug - 2024 03 Min 51 Sec 45/60 -
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M M.Faiq 22 - May - 2024 02 Min 46 Sec 40/60 -
M Muhammad Sadaqat 10 - Mar - 2023 03 Min 54 Sec 40/60 -
H Haseeb Ur Rehman raja 25 - Jun - 2024 05 Min 10 Sec 40/60
ECAT Class Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 2 | Huygen's theory cannot explain |
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
|
| 3 | 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
|
| 4 | In YDS experiment, fringe spacing means the distance between two consecutive ____fringes. |
A. Bright
B. Dark
C. Any of A and B
D. None of these
|
| 5 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Smaller
B. Larger
C. Zero
D. None of these
|
| 6 | Monochromatic light means waves of: |
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
|
| 7 | 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
|
| 8 | The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself. |
A. Equal to
B. Greater than
C. Smaller than
D. None of these
|
| 9 | Huygen principle is used to determine: |
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 10 | 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
|
Test Questions
