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Which of the following is true for the principal axis of a spherical lens?
(a)A line passing through the optical center only
(b)A line passing through both focal points and the optical center
(c)A curved path around the lens
(d)A perpendicular line to the focal plane

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Important Questions on Light Energy

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Which one of the following factors affects the field of view of a lens?

EASY

HARD



HARD

EASY

HARD

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HARD

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