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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
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Question # 1
How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
Question # 2
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 # 3
The locus of all the points in the same phase of vibration is called:
Question # 4
Electromagnetic waves transport:
Question # 5
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 6
The ratio of the diameter of two convex lenses is _____-the ratio of their focal lengths:
Question # 7
The size of the image is maximum when its distance from the magnifying glass is:
Question # 8
A prism splits a beam of white light into seven component colors. This is so because
Question # 9
Monochromatic light means waves of:
Question # 10
The magnifier forms a virtual image of the object at:
Question # 11
Stars twinkle due to
Question # 12
Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
Question # 13
Frequency of red color as compared to that of violet color is:
Question # 14
With age, least distance of distinct vision:
Question # 15
A magnifier gives an image which is:
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 | Resolving power in mth order diffraction for grating is given by: |
A. R = N/m
B. R = m/N
C. R = N x m
D. None of these
|
| 2 | Speed of light in vacuum depends upon: |
A. Frequency
B. Wavelength
C. Amplitude
D. None of these
|
| 3 | Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength? |
A. Gamma rays, micro waves, visible light
B. Radio waves, ultraviolet waves, X-rays
C. Ultraviolet rays, infrared rays, micro waves
D. Visible light, gamma rays, radio waves
|
| 4 | To observe interference of light, the condition, which must be met with is that the sources must be: |
A. Monochromatic
B. Phase coherent
C. Both of above
D. None of above
|
| 5 | 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
|
| 6 | Light waves are: |
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
|
| 7 | With age, least distance of distinct vision: |
A. Increases
B. Decreases
C. Is not affected
D. None is correct
|
| 8 | 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
|
| 9 | A ray passing through optical center of a lens, after refraction: |
A. Passes through focus
B. Go deviated
C. Retraces its path
D. Both B and C
|
| 10 | 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
|
Test Questions