Question

If the absorptive power is $0.3$ then for zero transmissivity, the reflective power is -

• A. $0.3$
• B. $0.5$
• C. $0.7$
• D. $0.9$

Answer 1

The correct option is C $0.7$

For zero transmissivity, the sum of reflective power and absorptive power is $1$.

$\Rightarrow a+r=1$

$\Rightarrow 0.3+r=1$

$\Rightarrow r=0.7$

Hence, option $\left(C\right)$ is the correct answer.