AP EAMCET201724 Apr 2017Evening ShiftPhysicsDual Nature of MatterActual
A light with an energy flux of 18 ~W ~cm ⁻² falls on a non-reflecting surface at normal incidence. If the surface has an area of 20 ~cm ^2 , the average force exerted on the surface during a 30 minute time span is ____ (c=3 10^8 ~ms ⁻¹ ) .
Options
- A1.2 10⁻⁶ ~N
- B2.1 10⁻⁶ ~N
- C3.1 10⁻⁶ ~N
- D4.8 10⁻⁶ ~N
Correct answer
A. 1.2 10⁻⁶ ~N
Step-by-step solution
No solution. Refer to answer key.