A plane electromagnetic wave of wave intensity 6 W/m2 strikes a small mirror of area 40 cm2, held perpendicular to the approaching wave. The wavelength of the wave will be:
Answer & explanation
Correct answer: option 3
Wavelength of electromagnetic wave
$\lambda=\frac{c}{v}=\frac{3 \times 10^8}{2 \times 10^{10}}=1.5 \times 10^{-2}$ = 1.5 cm
Hence correct answer will be (C)