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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
The terms phase difference and path difference are:
Question # 2
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:
Question # 3
In an interference pattern of Young's double slit(YDS) experiment:
Question # 4
The magnifier forms a virtual image of the object at:
Question # 5
The velocity of light in vacuum can be changed by changing
Question # 6
Huygen's principles states that:
Question # 7
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 # 8
Laws of reflection and refraction can also be explained by:
Question # 9
With age, least distance of distinct vision:
Question # 10
In the formula R = N x m for diffraction grating, N denotes:
Question # 11
The contrast in the fringes in an interference pattern depends upon
Question # 12
Stars twinkle due to
Question # 13
Light appears to travel in straight line because
Question # 14
The least distance of distinct vision is:
Question # 15
The wave nature of light was proposed by:
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 | Huygen's principles states that: |
A. Light has dual nature
B. Either of these
C. None of these
D. Light travels in straigth line
|
| 3 | 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
|
| 4 | 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
|
| 5 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 6 | 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
|
| 7 | 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. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
|
| 8 | In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves: |
A. Greater than
B. Equal to
C. Smaller than
D. None of these
|
| 9 | Electromagnetic waves transport: |
A. Energy only
B. Momentum only
C. Both A and B are correct
D. None of is correct
|
| 10 | The contrast in the fringes in an interference pattern depends upon |
A. Fringe width
B. Relative difference intensities of the two sources
C. Distance between the slits
D. Wavelength
|
Test Questions
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