Physics

Problem

A beam of plane polarised light of large cross-sectional area and uniform intensity of

3.3 \text{ Wm}^{-2}

falls normally on a polariser (cross sectional area

3 \times 10^{-4} \text{ m}^2

) which rotates about its axis with an angular speed of

31.4 \text{ rad/s}

. The energy of light passing through the polariser per revolution, is close to : [Main Sep. 04, 2020 (I)] (a)

1.0 \times 10^{-5} \text{ J}

(b)

1.0 \times 10^{-4} \text{ J}

(c)

1.5 \times 10^{-4} \text{ J}

(d)

5.0 \times 10^{-4} \text{ J}