a concave mirror with a radius of curvature of 3 metre is used as rear view mirror for a vehicle if a bus is located at 5m from this mirror find the position nature and size of the image
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R = 3m, u = -5m,
f = R/2 = 3/2 = 1.5m
1/v + 1/u = 1/f
→1/v + 1/-5 = 1/1.5
→ 1/v = 1/5 + 2/3
Taking LCM,
= (3 + 10)/15 = 13/15
∴ v = (15/13)m = 1.15 m
v = + 1.15m.
The image is virtual and erect.
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