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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
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 2
The cause of mirage observed in deserts in bright sunlight is due to
Question # 3
Conventionally, all the distance p, q, f are measured from _____ of the lens:
Question # 4
Monochromatic light means waves of:
Question # 5
Least distance of distinct vision of an old man possibly becomes:
Question # 6
In case of point, source of light shape of wavefront is:
Question # 7
The property of light which does not change with the nature of the medium is:
Question # 8
The terms phase difference and path difference are:
Question # 9
Certain light of wavelength 600 nm is used to view an object under the microscope. If the aperture of its objective is 1.22 cm, then the limiting angle of resolution will be:
Question # 10
The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
Question # 11
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 12
The magnifier forms a virtual image of the object at:
Question # 13
In an interference pattern of Young's double slit(YDS) experiment:
Question # 14
Wave length of light, on the average, is given by:
Question # 15
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
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 -
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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 -
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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 Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | The ratio of the size of the image to that of object is called: |
A. Focal length
B. Aperture
C. Linear magnification
D. Principal axis
|
| 2 | 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
|
| 3 | For the virtual image, option _______ is not correct: |
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
|
| 4 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 5 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
| 6 | A virtual image is formed when object is placed: |
A. Within focal length of a convex lens
B. Near the focal point of a concave lens
C. Both A and B
D. Away from 2F of a convex lens
|
| 7 | Light has: |
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
|
| 8 | 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
|
| 9 | The velocity of light in vacuum can be changed by changing |
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
|
| 10 | Wave length of light, on the average, is given by: |
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
|
Test Questions
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