Q: A monochromatic source of light operating at 200 W emits 4×1020 photons per second. Find the wavelength of the light.
Sol: Energy of photon , $\large E = \frac{P}{N/t} $
$\large E = \frac{200}{4 \times 10^{20}} $
E = 5 × 10-19 J
Science and Education
Q: A monochromatic source of light operating at 200 W emits 4×1020 photons per second. Find the wavelength of the light.
Sol: Energy of photon , $\large E = \frac{P}{N/t} $
$\large E = \frac{200}{4 \times 10^{20}} $
E = 5 × 10-19 J