Question

Read the following statements and choose the correct option.
(A) Onlly a point source forms a complete umbra.
(B) An extended source forms a complete umbra and penumbra.
A. Only A is true
B. Only B is true
C. Both A and B are true
D. Both A and B are false

Answer 1

Correct Answer - C
Only a point source of light forms a complete dark patch on a screen, i.e., umbra.
An extended source of light forms both umbra and penumbra.