Question

When \(170\) J of energy is incident on a surface of a body, \(17\) J of energy is reflected by it. If the coefficient of absorption is \(0.7\), then the amount of energy transmitted will be

• A. \(3.4\) J
• B. \(11.9\) J
• C. \(34.0\) J
• D. \(119.0\) J

Hint:

Reflection, absorption and transmission coefficients add up to 1.

Answer 1

The Correct Option is C

Step 1: Energy Accounting:
Absorbed energy $=0.7\times170=119$ J. Reflected $=17$ J.

Step 2: Remainder:
Transmitted $=170-119-17=34$ J.

Step 3: Answer:
Option (C).

Final Answer:
Option (C). \[ \boxed{\text{(C) } 34.0\ \text{J}} \]