Question

The radius of curvature of a concave mirror is 20cm . Where should an object be placed in front of concave mirror so that real image of double the size of the object is formed?​

Answer 1

Answer:

P= 15 cm

Explanation:

Given Data:

R = 20cm, f = R/2 =10cm

P = ? (Distance of the object)

q =2p (from definition of magnification)

Formula for concave mirror is

1/f = 1/p + 1/q

1/f = 1/p + 1/2p

1/f = 3/2p

P = 3f/2 =(3×10cm)/2

P = 15cm

Answer 2

Answer:

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Explanation:

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