A monochromatic source of light operation at 200 W emits 4 * 10^20 photons per second. Find the wavelength of the light ( in * 10^-7 m) A monochromatic source of light operation at 200 W emits 4 * 10^20 photons per second. Find the wavelength of the light ( in * 10^-7 m) October 14, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related