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1} Answer:
u = -20cm, f = 15cm
formula,= 1/f = 1/u + 1/v
= 1/v = 1/15 - 1/-20
= 1/v = 1/15 - 1/20
= 7/60
v = 8.57cm.
Nature of the image = Virtual.
image formed behaind mirror.
2} Answer:
u = - 20cm,
R = 30cm,
f = R/2 = 30/2 = 15cm,
formula,= 1/f = 1/u + 1/v
= 1/v = 1/15 + 1/20
= 1/v = 7/60
= 60/7
v = 8.6cm.
image is virtual and erect.
image formed behaind the mirror.
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