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AP EAMCET202319 May 2023Morning ShiftPhysicsDual Nature of MatterActual

Electromagnetic waves of energy flux 75 10^4 Wm ⁻² incidents normally on a surface of area 40 ~cm ^2 . If absorbs the surface the flux completely, the total momentum delivered to the surface in one second is

Options

  1. A10⁻² kgms ⁻¹
  2. B10⁻³ kgms ⁻¹
  3. C10⁻⁴ kgms ⁻¹
  4. D10⁻⁵ kgms ⁻¹

Correct answer

D. 10⁻⁵ kgms ⁻¹

Step-by-step solution

aligned & Momentum transferred = Force time & = I C A Pressure Area t = I C A t & = 75 10^4 3 10^8 40 10⁻⁴ 1=10⁻⁵ kgms ⁻¹ aligned

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