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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
In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
Question # 2
Resolving power in mth order diffraction for grating is given by:
Question # 3
The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
Question # 4
Conventionally, all the distance p, q, f are measured from _____ of the lens:
Question # 5
Wave length of that color as compared to that of violet color is:
Question # 6
In the formula R = N x m for diffraction grating, N denotes:
Question # 7
The velocity of light in vacuum can be changed by changing
Question # 8
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 9
For the virtual image, option _______ is not correct:
Question # 10
A prism splits a beam of white light into seven component colors. This is so because
Question # 11
The locus of all points in a medium having same phase of vibration is called
Question # 12
Monochromatic light means waves of:
Question # 13
The least distance of distinct vision is:
Question # 14
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 15
Angle between the ray of light and the corresponding wavefront 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 -
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 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
| 2 | 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
|
| 3 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 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 | The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is: |
A. 1
B. 0.2
C. 2
D. 0.1
|
| 6 | 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
|
| 7 | To see the minor details of the object by microscope, it should have: |
A. High magnifying power
B. High resolving power
C. Am objective of larger focal length
D. None of these
|
| 8 | To observe interference of light, the condition, which must be met with is that the sources must be: |
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
|
| 9 | The cause of mirage observed in deserts in bright sunlight is due to |
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
|
| 10 | The contrast in the fringes in an interference pattern depends upon |
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
|
Test Questions
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