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प्रश्न
The equiconvex lens has a focal length 'f'. If the lens is cut along the line perpendicular to principal axis and passing through the pole, what will be the focal length of any half part?
विकल्प
`"3f"/2`
`"f"/2`
f
2f
MCQ
उत्तर
2f
Explanation:
`1/"f" = 1/"f"_1 + 1/"f"_1 = 2/"f"_1`
∴ F1 = 2f
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Defects of Lenses (Aberrations of Optical Images)
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