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Home
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NUST Entrance Test
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Physics
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Optical Instruments
Set 2
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MM
Mashaal Masha
Oct 15, 2022
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Choose the correct options for the following questions.
Conventionally, all the distances p, q, f are measured from _____ of the lens
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Difficulty: Easy
A:
focus
B:
optical centre
C:
edges
D:
none
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If the object and its image are located at a distance of 5 cm from the focus of a convex lens, the focal length of the lens will be:
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Difficulty: Easy
A:
5 cm
B:
10 cm
C:
20 cm
D:
25 cm
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