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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
Light appears to travel in straight line because
Question # 2
The magnifier forms a virtual image of the object at:
Question # 3
A convex lens acts as diverging lens when the object is placed:
Question # 4
A convex lens acts as diverging lens when the object is placed:
Question # 5
To sources are said to be coherent if they have:
Question # 6
Light waves are:
Question # 7
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 8
When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
Question # 9
Electromagnetic waves transport:
Question # 10
Huygen principle is used to determine:
Question # 11
Huygen's theory cannot explain
Question # 12
A virtual image is formed when object is placed:
Question # 13
The contrast in the fringes in an interference pattern depends upon
Question # 14
The property of light which does not change with the nature of the medium is:
Question # 15
The magnifier forms a virtual image of the object at:
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 | Stars twinkle due to |
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
|
| 2 | 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
|
| 3 | Huygen principle is used to determine: |
A. Speed of light
B. Location of wavefront
C. About polarized or unpolarized light
D. None of them
|
| 4 | 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
|
| 5 | 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: |
A. 6 x 10-5rad
B. 7 x 10-5rad
C. 8 x 10-5rad
D. None of these
|
| 6 | Huygen's principles states that: |
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
|
| 7 | In order to get interference using two light rays |
A. The sources should be monochromatic and coherent
B. The sources should have the same frequency
C. Superposition should be linear
D. All of these
|
| 8 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Smaller
B. Larger
C. Zero
D. None of these
|
| 9 | Light appears to travel in straight line because |
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
|
| 10 | 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
|
Test Questions
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