Q. The sun makes $0.5{^\circ}$ angle of earth surface. Its image is made by convex lens of $50\ cm$ focal length. The diameter of the image will be
A) $5\ mm$
B) $4.36\ mm$
C) $7\ mm$
D) None of these
Explanation
(b) Diameter of image $d = \left( 0.5 \times \frac{\pi}{180} \right) \times 500\ mm = 4.36\ mm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.