Question

a convex lense form a real and inverted image of a middle at a distance of 50 cm from it there is the middle place in front of the convex lense if the image is equal and find power of the lense​

Answer 1

Explanation:

Object distance, u= – 50 cm

Object distance, u= – 50 cmImage distance, v= 50 cm

Object distance, u= – 50 cmImage distance, v= 50 cmFocal length = f

Object distance, u= – 50 cmImage distance, v= 50 cmFocal length = fAccording to the lens formula,

Object distance, u= – 50 cmImage distance, v= 50 cmFocal length = fAccording 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.

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