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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 velocity of light in vacuum can be changed by changing
Question # 2
The image of the tip of a needle is never sharp because of
Question # 3
Speed of light in vacuum depends upon:
Question # 4
A virtual image is formed when object is placed:
Question # 5
Light appears to travel in straight line because
Question # 6
A ray passing through optical center of a lens, after refraction:
Question # 7
A convex lens acts as diverging lens when the object is placed:
Question # 8
The contrast in the fringes in an interference pattern depends upon
Question # 9
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 # 10
The locus of all the points in the same phase of vibration is called:
Question # 11
When the object lies between F and 2F, the image formed by is formed at:
Question # 12
Which one of the following phenomenon cannot be explained on the bases of Huygen's theory
Question # 13
Frequency of red color as compared to that of violet color is:
Question # 14
A convex lens acts as diverging lens when the object is placed:
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 | The wave nature of light was proposed by: |
A. Newton
B. Thomas Young
C. Huygen
D. None of these
|
| 2 | 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
|
| 3 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 4 | The least distance of distinct vision is: |
A. 10 cm
B. 25 cm
C. 50 cm
D. 100 cm
|
| 5 | A convex lens acts as diverging lens when the object is placed: |
A. Beyond 2F
B. At 2F
C. With focal length
D. Between F and 2F
|
| 6 | According to Huygen's principle |
A. light travels in straight line
B. Light is a transvers wave
C. Light has dual nature
D. All points on the primary wave-front are the sources of secondary wavelets
|
| 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 | A convex lens acts as diverging lens when the object is placed: |
A. Between F and 2F
B. At 2F
C. With focal length
D. Beyond 2F
|
| 9 | 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
|
| 10 | For the virtual image, option _______ is not correct: |
A. 1/p = 1/f -1/q
B. 1/f = 1/p -1/q
C. 1/p=1/p-1/f
D. 1/p=1/f+1/q
|
Test Questions