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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
When a source of light isat very large distance,the shape of wavefront is:
Question # 2
A virtual image is formed when object is placed:
Question # 3
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 4
When the object lies between F and 2F, the image formed by is formed at:
Question # 5
The cause of mirage observed in deserts in bright sunlight is due to
Question # 6
The speed of the secondary wavelets as mentioned in Huygen's principle is _____ the speed of propagation of the wave itself.
Question # 7
A convex lens acts as diverging lens when the object is placed:
Question # 8
Which one of the following can act approximately as a source of monochromatic light;
Question # 9
The contrast in the fringes in an interference pattern depends upon
Question # 10
A grating with high resolving power can distinguish _______ difference in wavelengths :
Question # 11
In case of point, source of light shape of wavefront is:
Question # 12
The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
Question # 13
When the same object is viewed at a shorter distance, the image on the retina of the eye is _____ the so the object appears:
Question # 14
Huygen principle is used to determine:
Question # 15
A prism splits a beam of white light into seven component colors. This is so because
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ECAT Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Stars twinkle due to |
A. The fact that they do not emit light continuously
B. The refractive index of earth's atmosphere fluctuates
C. The Star's atmosphere absorbs its light intermittently
D. None of these
|
| 2 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 3 | The least distance of distinct vision is: |
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
|
| 4 | Which one of the following can act approximately as a source of monochromatic light; |
A. Neon lamp
B. Fluorescent tube
C. Sodium lamp
D. None of these
|
| 5 | 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
|
| 6 | Light waves are: |
A. Transverse wave
B. Longitudinal wave
C. Compressional wave
D. None of them
|
| 7 | Conventionally, all the distance p, q, f are measured from _____ of the lens: |
A. Focus
B. Optical center
C. Edges
D. None of these
|
| 8 | 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
|
| 9 | Huygen's theory cannot explain |
A. Diffraction
B. Interference
C. Polarization
D. Photoelectric effect
|
| 10 | The magnifier forms a virtual image of the object at: |
A. None of these
B. Least distance of distinct vision
C. Much farther than the least distance
D. Both A and B are correct
|
Test Questions
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