General Principles in the Working of Telescope, Microscope NDA Questions

NDA Physics

General Principles in the Working of Telescope, Microscope MCQ Questions


13.
What is the primary reason telescopes are placed on mountains?
A.
To avoid light pollution
B.
To get closer to space
C.
To reduce atmospheric distortion
D.
To reduce cost
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ANSWER :
C. To reduce atmospheric distortion
14.
What is the main purpose of an optical telescope?
A.
To detect gravitational waves
B.
To detect visible light
C.
To detect gamma rays
D.
To detect X-rays
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ANSWER :
B. To detect visible light
15.
What is the largest radio telescope in the world?
A.
FAST (China)
B.
Arecibo Observatory
C.
Green Bank Telescope
D.
ALMA (Chile)
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ANSWER :
A. FAST (China)
16.
What does the term "aperture" in a telescope refer to?
A.
Lens curvature
B.
Diameter of the lens/mirror
C.
Focal length
D.
Magnification
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ANSWER :
B. Diameter of the lens/mirror
17.
What is the focal length of a telescope?
A.
Distance between lens and image
B.
Width of the mirror
C.
Power of magnification
D.
Resolution capability
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ANSWER :
A. Distance between lens and image
18.
Which planet was discovered using a telescope?
A.
Mars
B.
Neptune
C.
Uranus
D.
Jupiter
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ANSWER :
C. Uranus