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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
The distance from eye to near point is taken as:
Question # 2
The appearance of the colour in the soap (oil) film results from:
Question # 3
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 4
Stars twinkle due to
Question # 5
The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
Question # 6
The contrast in the fringes in an interference pattern depends upon
Question # 7
Conventionally, all the distance p, q, f are measured from _____ of the lens:
Question # 8
The locus of all the points in the same phase of vibration is called:
Question # 9
To sources are said to be coherent if they have:
Question # 10
When the object lies between F and 2F, the image formed by is formed at:
Question # 11
The magnifier forms a virtual image of the object at:
Question # 12
In order to get interference using two light rays
Question # 13
A convex lens acts as diverging lens when the object is placed:
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
Speed of light in vacuum depends upon:
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 -
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 -
S suzi 09 - Feb - 2026 01 Min 42 Sec 44/60 -
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 | 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
|
| 2 | In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves: |
A. Greater than
B. Smaller than
C. Equal to
D. None of these
|
| 3 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
| 4 | 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
|
| 5 | Speed of light in vacuum depends upon: |
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
|
| 6 | Huygen principle is used to determine: |
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 7 | In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves: |
A. Greater than
B. Equal to
C. Smaller than
D. None of these
|
| 8 | 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
|
| 9 | According to Huygen's principle |
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
|
| 10 | Frequency of red color as compared to that of violet color is: |
A. Equal
B. Smaller
C. Greater
D. None of these
|
Test Questions
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