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Question: Radiations of intensity 0.5 W\(m^{- 2}\)are striking a metal plate. The pressure on the plate is:...

Radiations of intensity 0.5 Wm−2m^{- 2}are striking a metal plate. The pressure on the plate is:

A

0.166×10−8Nm−20.166 \times 10^{- 8}Nm^{- 2}

B

0.332×10−8Nm−20.332 \times 10^{- 8}Nm^{- 2}

C

0.111×10−8Nm−20.111 \times 10^{- 8}Nm^{- 2}

D

0.083×10−8Nm−20.083 \times 10^{- 8}Nm^{- 2}

Answer

0.166×10−8Nm−20.166 \times 10^{- 8}Nm^{- 2}

Explanation

Solution

: P=Ic=0.53×108P = \frac{I}{c} = \frac{0.5}{3 \times 10^{8}}

=0.166×10−8Nm−2= 0.166 \times 10^{- 8}Nm^{- 2}