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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
The wave nature of light was proposed by:
Question # 2
Wave length of that color as compared to that of violet color is:
Question # 3
The locus of all the points in the same phase of vibration is called:
Question # 4
Electromagnetic waves transport:
Question # 5
When the object lies between F and 2F, the image formed by is formed at:
Question # 6
Light has:
Question # 7
In the formula R = N x m for diffraction grating, N denotes:
Question # 8
If the object is situated at focus of a convex lens, then its image is formed at:
Question # 9
A convex lens acts as diverging lens when the object is placed:
Question # 10
The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
Question # 11
Laws of reflection and refraction can also be explained by:
Question # 12
In case of constructive interference of two waves, the amplitude of the resultant wave is _______ either of the waves:
Question # 13
The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
Question # 14
Wave length of light, on the average, is given by:
Question # 15
The locus of all points in a medium having same phase of vibration is called
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 -
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T Tasser Haider 31 - May - 2024 01 Min 13 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 | Light has: |
A. Wave nature
B. Particle nature
C. Dual nature
D. None of these
|
| 2 | A grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Larger
B. Zero
C. None of these
D. Smaller
|
| 3 | The terms phase difference and path difference are: |
A. Same
B. Different
C. Equal
D. None of these
|
| 4 | Monochromatic light means waves of: |
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
|
| 5 | Huygen's theory cannot explain |
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
|
| 6 | Light appears to travel in straight line because |
A. It is not absorbed by the atmosphere
B. It is refracted by the atmosphere
C. Its wavelength is very small
D. Its velocity is very large
|
| 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. 5 cm
B. 20 cm
C. 10 cm
D. 15 cm
|
| 8 | 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
|
| 9 | The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself. |
A. Equal to
B. Greater than
C. Smaller than
D. None of these
|
| 10 | 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
|
Test Questions