A 5.0cm tall object is placed at a distance of 50cm from a concave lens of focal length 20cm find. The position,size and height of image
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h=5 cm
u= -50cm
f= -20 cm
position v= by the formula 1/f=1/v+1/u=33.3 cm
v is positive so image is formed behind the lens
size of the image= by the formula m=v/u =33.3/-50 =0.6cm
m<1 the image is diminished
h'=vh/u and calculate height of the image
Explanation:
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