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MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics
Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 9 Physical Optics
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Total Questions15
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Time Allowed20
Physics ECAT Pre Engineering Chapter 9 Physical Optics
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Question # 1
Which one the following gives three regions of electromagnetic spectrum in order of increasing wavelength?
Question # 2
The superposition of the two waves of same frequency and amplitude travelling in the same direction gives to an effect called
Question # 3
The wave nature of light was proposed by:
Question # 4
The magnifier forms a virtual image of the object at:
Question # 5
Light appears to travel in straight line because
Question # 6
Light waves are:
Question # 7
In the formula R = N x m for diffraction grating, N denotes:
Question # 8
Huygen's principles states that:
Question # 9
In order to get interference using two light rays
Question # 10
A ray passing through optical center of a lens, after refraction:
Question # 11
Least distance of distinct vision of an old man possibly becomes:
Question # 12
The image of an object 5 mm length is only 1 cm high. The magnification produced by lens is:
Question # 13
The terms phase difference and path difference are:
Question # 14
When a source of light isat very large distance,the shape of wavefront is:
Question # 15
Huygen's theory cannot explain
Top Scorers Of Physics ECAT Pre Engineering Chapter 9 Physical Optics MCQ`s Test
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F Farzand Shah Farzand Shah 17 - Apr - 2024 01 Min 00 Sec 60/60 -
D Deuspeu 25 - Sep - 2024 01 Min 40 Sec 60/60 -
U Umarkhan35429@gmail.com Khan 04 - May - 2024 05 Min 00 Sec 60/60 -
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A Alishba Dabeer 02 - Jun - 2024 03 Min 25 Sec 45/60 -
T Tamshi Sohail 21 - Apr - 2024 06 Min 48 Sec 45/60
ECAT Physics Chapter 9 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | 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
|
| 2 | In YDS experiment, fringe spacing means the distance between two consecutive ____fringes. |
A. Bright
B. Dark
C. Any of A and B
D. None of these
|
| 3 | The appearance of the colour in the soap (oil) film results from: |
A. Dispersion
B. Interference
C. Reflection
D. Refraction
|
| 4 | 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
|
| 5 | Monochromatic light means waves of: |
A. Same frequency
B. Same colour
C. Same wavelength
D. All of them
|
| 6 | The wave nature of light was proposed by: |
A. Newton
B. Thomas Young
C. Huygen
D. None of these
|
| 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. 15 cm
B. 10 cm
C. 20 cm
D. 5 cm
|
| 8 | The terms phase difference and path difference are: |
A. Same
B. Different
C. Equal
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 grating with high resolving power can distinguish _______ difference in wavelengths : |
A. Smaller
B. Larger
C. Zero
D. None of these
|
Test Questions