Light from a point source in air falls on a convex curved surface of radius 20 cm and refractive index 1 . 5 . If the source is located at 100 cm from the convex surface, the image will be formed at _

Question

Light from a point source in air falls on a convex curved surface of radius 20 cm and refractive index 1 . 5 . If the source is located at 100 cm from the convex surface, the image will be formed at ______ cm from the object.

TestHub · Accepted Answer

μ 2 v - μ 1 u = μ 2 − μ 1 R ⇒ 1 .5 v − 1 − 100 = 1 .5 − 1 20 ⇒ v = 100 cm Distance from object = 100 + 100 = 200 cm

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