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JEE Main20253 Apr 2025Morning ShiftPhysicsDual Nature of MatterActual

The radiation pressure exerted by a 450 W light source on a perfectly reflecting surface placed at 2 m away from it, is :

Options

  1. A1.5 10⁻⁸ Pascals
  2. B0
  3. C6 10⁻⁸ Pascals
  4. D3 10⁻⁸ Pascals

Correct answer

C. 6 10⁻⁸ Pascals

Step-by-step solution

P_ rad = 2 I C Where I = intensity at surface C = Speed of light aligned & I= Power Area = 450 4 r ^2 & = 450 4 4 = 450 16 & P_ rad = 2 450 16 3 10^8 = 150 8 10^8 aligned =5.97 10⁻⁸ 6 10⁻⁸ Pascals

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