AP EAMCET20224 Jul 2022Evening ShiftPhysicsThermal Properties of MatterActual
A light of intensity 12 W m - 2 incidents on a black surface of area 4 cm 2 . The radiation pressure on the surface is
Options
- A1 × 10 - 8   Pa
- B4 × 10 - 8   Pa
- C1 . 6 × 10 - 7   Pa
- D4 . 8 × 10 - 7   Pa
Correct answer
B. 4 × 10 - 8   Pa
Step-by-step solution
Black surface will be considered as a perfectly absorbing surface. In this case, radiation pressure will be given by, P = I c = 12   W   m - 2 3 × 10 8   m   s - 1 = 4 × 10 - 8   Pa