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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 convex lens acts as diverging lens when the object is placed:
Question # 2
Which one of the following can act approximately as a source of monochromatic light;
Question # 3
The distance from eye to near point is taken as:
Question # 4
Frequency of red color as compared to that of violet color is:
Question # 5
When a source of light isat very large distance,the shape of wavefront is:
Question # 6
The magnifier forms a virtual image of the object at:
Question # 7
When the object lies between F and 2F, the image formed by is formed at:
Question # 8
The magnifier forms a virtual image of the object at:
Question # 9
Huygen's theory cannot explain
Question # 10
Stars twinkle due to
Question # 11
The cause of mirage observed in deserts in bright sunlight is due to
Question # 12
To see the minor details of the object by microscope, it should have:
Question # 13
Laws of reflection and refraction can also be explained by:
Question # 14
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 15
Monochromatic light means waves of:
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 -
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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 locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 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 | Huygen's principles states that: |
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
|
| 4 | A line which represents the direction of travel of a wave is known as: |
A. Spherical Wavefront
B. Locus
C. Ray
D. Either B or C
|
| 5 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Larger
B. Zero
C. None of these
D. Smaller
|
| 6 | 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
|
| 7 | In an interference pattern of Young's double slit(YDS) experiment: |
A. Bright fringesare wider than dark fringes
B. Dark fringes are wider than bright fringes
C. Both dark and bright fringes are of equal width
D.
Central fringes are wider than the outer fringes
|
| 8 | Speed of light in vacuum depends upon: |
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
|
| 9 | 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
|
| 10 | The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths: |
A. Greater than
B. Less than
C. Equal to
D. None of these
|
Test Questions