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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
Conventionally, all the distance p, q, f are measured from _____ of the lens:
Question # 2
Stars twinkle due to
Question # 3
In case of destructive interference of two waves, the amplitude of the resultant wave will be ____ either of the waves:
Question # 4
Which one of the following can act approximately as a source of monochromatic light;
Question # 5
Resolving power in mth order diffraction for grating is given by:
Question # 6
In an interference pattern of Young's double slit(YDS) experiment:
Question # 7
The focal length of convex lens having magnifying power of 5.55 is:
Question # 8
A prism splits a beam of white light into seven component colors. This is so because
Question # 9
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 10
If the object is placed at 12 cm distance from a convex lens of focal length 6 cm, then we get an image of ____ as that of object:
Question # 11
A line which represents the direction of travel of a wave is known as:
Question # 12
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 13
The wave nature of light was proposed by:
Question # 14
To observe interference of light, the condition, which must be met with is that the sources must be:
Question # 15
The velocity of light in vacuum can be changed by changing
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 -
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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 -
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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 distance from eye to near point is taken as: |
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
|
| 2 | In case of point, source of light shape of wavefront is: |
A. Spherical
B. Cylindrical
C. Plane
D. None of these
|
| 3 | The image of the tip of a needle is never sharp because of |
A. Polarization of light
B. Interference of light
C. Diffraction of light
D. Reflection of light
|
| 4 | Huygen principle is used to determine: |
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 5 | The focal length of convex lens having magnifying power of 5.55 is: |
A. 5.5 cm
B. 5 cm
C. 4.5 cm
D. 6 cm
|
| 6 | Laws of reflection and refraction can also be explained by: |
A. Particle nature of light
B. Quantum nature of light
C. Wave nature of light
D. Complex nature of light
|
| 7 | Wave length of that color as compared to that of violet color is: |
A. Smaller
B. Longer
C. Equal
D. None of these
|
| 8 | Conventionally, all the distance p, q, f are measured from _____ of the lens: |
A. Focus
B. Optical center
C. Edges
D. None of these
|
| 9 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Smaller
B. Larger
C. Zero
D. None of these
|
| 10 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
Test Questions