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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 the formula R = N x m for diffraction grating, N denotes:
Question # 2
Huygen's principles states that:
Question # 3
To sources are said to be coherent if they have:
Question # 4
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 # 5
The least distance of distinct vision is:
Question # 6
Light appears to travel in straight line because
Question # 7
The size of the image is maximum when its distance from the magnifying glass is:
Question # 8
If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focus length of the lens will be:
Question # 9
With age, least distance of distinct vision:
Question # 10
The terms phase difference and path difference are:
Question # 11
To see the minor details of the object by microscope, it should have:
Question # 12
Laws of reflection and refraction can also be explained by:
Question # 13
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 # 14
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 15
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
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 -
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 | If the focal length of the convex lens is 5 cm, then to get the real and inverted image of the same size as that of object, the object should be placed at: |
A. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
|
| 2 | The magnifier forms a virtual image of the object at: |
A. None of these
B. Both A and B are correct
C. Much farther than the least distance
D. Least distance of distinct vision
|
| 3 | 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
|
| 4 | Wave length of light, on the average, is given by: |
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
|
| 5 | The velocity of light in vacuum can be changed by changing |
A. Frequency
B. Amplitude
C. Wavelength
D. None of these
|
| 6 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Larger
B. Zero
C. None of these
D. Smaller
|
| 7 | 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
|
| 8 | With age, least distance of distinct vision: |
A. Increases
B. Decreases
C. Is not affected
D. None is correct
|
| 9 | The distance from eye to near point is taken as: |
A. 10 cm
B. 15 cm
C. 20 cm
D. 25 cm
|
| 10 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
Test Questions