Radiations of intensity \(0.5 \mathrm{Wm}^{-2}\) are striking a metal plate, the pressure on the plate is

Radiations of intensity \(0.5 \mathrm{Wm}^{-2}\) are striking a metal plate, the pressure on the plate is
  1. \(0.166 \times 10^{-8} \mathrm{Nm}^{-2}\)
  2. \(0.332 \times 10^{-8} \mathrm{Nm}^{-2}\)
  3. \(0.111 \times 10^{-8} \mathrm{Nm}^{-2}\)
  4. \(0.083 \times 10^{-8} \mathrm{Nm}^{-2}\)

Solution

Intensity of radiation, \(I=0.5 \mathrm{Wm}^{-2}\) Pressure on the plate due to radiation is given by \(p=\frac{I}{c}=\frac{0.5}{3 \times 10^8}=0.166 \times 10^{-8} \mathrm{Nm}^{-2}\)

Asked in: AP EAMCET 2020 (17 Sep Shift 2)

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