A 3.0 cm lighted candle is placed 20 cm from a concavespherical mirror with a ra

Question

A 3.0 cm lighted candle is placed 20 cm from a concavespherical mirror with a radius of curvature of 30 cm. a). Where should a screen be placed in order to see thecandle's image clearly?------cm b). What is the minimum height of the screen in order to seethe candle's complete image?------cm A 3.0 cm lighted candle is placed 20 cm from a concavespherical mirror with a radius of curvature of 30 cm. a). Where should a screen be placed in order to see thecandle's image clearly?------cm b). What is the minimum height of the screen in order to seethe candle's complete image?------cm

Explanation / Answer

h=3cm d'=20cm r=30cm f=-r/2=-15cm 1)1/f=1/d+1/d' 1/15=1/d+1/20=>d=-8.57 2)m= -d/d'=0.428 the proportion of the original object needed=0.428*3=1.2cm

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