Question

For complete absorption, which of the following is true?

$a\to$ Absorptive power
$r\to$ Reflective power

• A. $a=0,r=1$
• B. $a=1,r=0$
• C. $a=1,r=1$
• D. $a=0,r=0$

Answer 1

The correct option is B $a=1,r=0$

For complete absorption,

$\text{Energy absorbed}=\text{Energy incident}\Rightarrow a=1$

And,

$\text{Energy reflected}=0\Rightarrow r=0$

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