Question

a small candle of 2.5cm in size is placed 27 cm in front of concave mirror of radius of curvature 36 cm. at what distance from the mirror should a screen be placed in order to receive sharp image. if the candle is moved closer to the mirror how should the screen have to be moved​

Answer 1

distance of candle (u) = -27cm

radius of curvature = 36cm

so,

focal length=36÷2 = 18 cm

By mirror formula =1