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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 an interference pattern of Young's double slit(YDS) experiment:
Question # 2
The least distance of distinct vision is:
Question # 3
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 # 4
The distance from eye to near point is taken as:
Question # 5
A convex lens acts as diverging lens when the object is placed:
Question # 6
A line which represents the direction of travel of a wave is known as:
Question # 7
The size of the image is maximum when its distance from the magnifying glass is:
Question # 8
In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
Question # 9
Monochromatic light means waves of:
Question # 10
Which one of the following can act approximately as a source of monochromatic light;
Question # 11
The locus of all the points in the same phase of vibration is called:
Question # 12
Light waves are:
Question # 13
Wave length of light, on the average, is given by:
Question # 14
Huygen principle is used to determine:
Question # 15
How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
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 | Light has: |
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
|
| 2 | 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
|
| 3 | 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
|
| 4 | The locus of all points in a medium having same phase of vibration is called |
A. Crest
B. Trough
C. Wavelength
D. Wave-front
|
| 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 | 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
|
| 7 | Wave length of light, on the average, is given by: |
A. 10-14m
B. 10-10m
C. 10-6m
D. 10-4m
|
| 8 | Angle between the ray of light and the corresponding wavefront is: |
A. 0°
B. 60°
C. 90°
D. 120°
|
| 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 | 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: |
A. 5 cm
B. 10 cm
C. 20 cm
D. 25 cm
|
Test Questions
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