Question

If 40% of the radiations incident upon a body are absorbed and 30% are transmitted, then its coefficient of reflection will be

• A. 1
• B. 0.4
• C. 0.7
• D. 0.3

Answer 1

Answer: (D)

0.3

We know, $a+t+r=1$
Where, $a$ stands for absorptivity $=0.4$
$t$ for transitivity $=0.3$ and
$r$ for reflectivity $=1-0.4-0.3=0.3$