Question

A parallel beam or light or intensity I is incident normally on a plane surface which absorbs $50\%$ of the incident light. The reflected light falls on which is perfect reflector, light reflected by B is again partly reflected and partly absorbed and this process continues, For all absorption by A, asborption coefficient is 0.5. The pressure experienced by A due to light is

• A. $\frac{1.51}{c}$
• B. $\frac{1}{c}$
• C. $\frac{31}{2c}$
• D. $\frac{3I}{c}$

Answer 1

The correct option is D $\frac{3I}{c}$

Option D is correct