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The sun subtends an angle of degrees at the vertex of a concave mirror of 36 cm radius of curvature. What will be the height of image of sun ?

The sun subtends an angle of  degrees at the vertex of a concave mirror of 36 cm radius of curvature. What will be the height of image of sun ?

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1 Answers

anurag
15 Points
5 years ago
using relation,
1/v+1/u=1/f
u=infiniteinfinite
v=f=R/2=15/2=7.5 cm
diameter of sun /distance of sun=0.5 deg= \pi/360rad
since, angular diameter=0.5=actual diametere of sun/distance of sun from the pole
diametere of image/diametere of sun =v/u= distance of  image/ distance of sun
=7.5/distance of sun
diameter of sun /distance of sun x 7.5
=7.5 x \Pi/360= 3.75 cm
 

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