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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
How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper:
Question # 2
Huygen principle is used to determine:
Question # 3
The magnifier forms a virtual image of the object at:
Question # 4
When the object lies between F and 2F, the image formed by is formed at:
Question # 5
The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
Question # 6
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 7
A convex lens acts as diverging lens when the object is placed:
Question # 8
A line which represents the direction of travel of a wave is known as:
Question # 9
The ratio of the size of the image to that of object is called:
Question # 10
In YDS experiment, fringe spacing means the distance between two consecutive ____fringes.
Question # 11
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 12
Huygen's theory cannot explain
Question # 13
The least distance of distinct vision is:
Question # 14
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 # 15
If yellow light emitted by sodium lamp in Young's double slit experiment is replaced by blue light of the same intensity
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H Heer 21 - Jan - 2024 00 Min 29 Sec 60/60 -
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T Tasser Haider 31 - May - 2024 01 Min 13 Sec 50/60 -
M Maham Mehar 31 - Jul - 2024 02 Min 42 Sec 50/60 -
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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 | The size of the image is maximum when its distance from the magnifying glass is: |
A. 0.10 m
B. 0.15 m
C. 0.20 m
D. 0.25 m
|
| 2 | When a source of light isat very large distance,the shape of wavefront is: |
A. Spherical
B. Cylindrical
C. Plane
D. None of these
|
| 3 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Larger
B. Zero
C. None of these
D. Smaller
|
| 4 | Which one of the following phenomenon cannot be explained on the bases of Huygen's theory |
A. Refraction
B. Reflection
C. Diffraction
D. Formation of spectrum
|
| 5 | A magnifier gives an image which is: |
A. Virtual, inverted
B. Real, erect
C. Virtual, erect
D. Real, inverted
|
| 6 | The cause of mirage observed in deserts in bright sunlight is due to |
A. Refraction of light
B. Reflection of light
C. Scattering of light
D. Total internal reflection of light
|
| 7 | Monochromatic light means waves of: |
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
|
| 8 | Least distance of distinct vision of an old man possibly becomes: |
A. A little less than 25 cm
B. A little more than 25 cm
C. Much less than 25 cm
D. None of these
|
| 9 | 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
|
| 10 | A prism splits a beam of white light into seven component colors. This is so because |
A. Phase of different colors is different
B. Amplitude of different colors is different
C. Wavelength of different colors is different
D. Velocity of different colors is different
|
Test Questions
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