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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
Wave length of light, on the average, is given by:
Question # 2
The contrast in the fringes in an interference pattern depends upon
Question # 3
Electromagnetic waves transport:
Question # 4
The ratio of the size of the image to that of object is called:
Question # 5
In order to get interference using two light rays
Question # 6
With age, least distance of distinct vision:
Question # 7
Angle between the ray of light and the corresponding wavefront is:
Question # 8
Light appears to travel in straight line because
Question # 9
The velocity of light in vacuum can be changed by changing
Question # 10
Monochromatic light means waves of:
Question # 11
The wave nature of light was proposed by:
Question # 12
The size of the image is maximum when its distance from the magnifying glass is:
Question # 13
To observe interference of light, the condition, which must be met with is that the sources must be:
Question # 14
How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
Question # 15
Least distance of distinct vision of an old man possibly becomes:
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 -
A Abdullah Baloch 27 - Jul - 2024 03 Min 48 Sec 50/60 -
E Esha Azeem 03 - Dec - 2023 15 Min 03 Sec 50/60 -
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 -
H Hira Maqsood 20 - Feb - 2024 07 Min 03 Sec 45/60 -
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 Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Huygen principle is used to determine: |
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 2 | 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
|
| 3 | 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
|
| 4 | If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be: |
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
|
| 5 | When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears: |
A. Greater, smaller
B. Smaller, smaller
C. Smaller, larger
D. Greater, larger
|
| 6 | 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
|
| 7 | The size of the image is maximum when its distance from the magnifying glass is: |
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
|
| 8 | A magnifier gives an image which is: |
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
|
| 9 | 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
|
| 10 | If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity |
A. Fringe width will decrease
B. Fringe width will increase
C. Fringe width will remain unchanged
D. Fringe will become less intense
|
Test Questions
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