question_answer

The sun makes 0.5o angle on earth surface.  Its image is made by convex lens of 50 cm focal length.  The diameter of the image will be                                                                   [CPMT 2003]

A)            5 mm                                       

B)            4.36 mm

C)            7 mm                                       

D)            None of these

Correct Answer: B

Solution :

                   Diameter of image \[d=\left( 0.5\times \frac{\pi }{180} \right)\times 500\]= 4.36 \[mm\]