Question

a convex lens forms a real and inverted in age of a needle placed in front of convex lens if the in age is equal to the size of the object ? also find the power of lens​

Answer 1

Explanation:

Object distance, u= – 50 cm

Image distance, v= 50 cm

Focal length = f

According to the lens formula,

u = -50 cm v = + 50 cm. f =? 1/f = 1/v €“ 1/u 1/f = 1/50 + 1/50 f = + 25 cm. = 0.25 m Power of lens (P) = 1/f = 1/ 0.25 = + 4D.

Answer 2

Answer:

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