A 40 W ultraviolet light source of wavelength 2480 A illuminates a magnesium (Mg) surface placed 2 m away. Determine the number of photons emitted from the surface per second and the number incident on unit area emitting electrons. Assuming that the work function of the surface can be neglected. Find the de-Broglie wavelength of electrons emitted. X-rays of wavelength lemda fall on photo-sensitive surface September 11, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related