Question

iii)
Programme
Radiant energy is incident on a body at
the rate of 2000 joules per minute. If the
reflection coefficient of the body is 0.1
and its transmission coefficient of the is
0.2, find the radiant energy (i) absorbed
(ii) reflected (iii) transmitted by the body
in 2 minutes.​

Answer 1

Answer:

a+ r+t=1 a= 1 - r -t = 1-0.2 -0.3 = 0.5

LetQa,QrandQt bet the quantities of radiant energy absorbed, reflected and transmitted in 3 minutes by the body, respectively.

(i) a=QaQ ∴Qa=aQ=0.5×3000=1500J

(ii) r=QrQ ∴Qr=rQ=0.2×3000=600J

(iii)t=QtQ ∴Qt□=tQ=0.3×3000=900J

Explanation:

MARK BRAINLIEST