The sun’s disc subtends an angle of 10-2rad at the earth. The radius of curvature (in meters) of the mirror which will produce on a screen an image of the sun 2cm in diameter is
A. 4
B. 7
C. 5
D. 2
Answer:A
The sun’s disc subtends an angle of 10-2rad at the earth. The radius of curvature (in meters) of the mirror which will produce on a screen an image of the sun 2cm in diameter is
A. 4 B. 7 C. 5 D. 2