Intense monoenergetic light source shines on piece of metal.When wavelength of the light is more than 620 nm, no photoelectronsare emitted from metal, and shorter wavelengths begin to produce aflux of photoelectrons. A 248 nm light source is aimed at the samemetal, hitting the metal with a power of 0.75 W.
(a) What is the range of energies of photoelectronsproduced?
(b) The electrons pass through a single slit, with slit width a=150 nm and slit perpendicular to the incoming photoelectrons. Thephotoelectrons travel L=1.5 m before they hit a screen and form aninterference intensity pattern. Due to diffraction, what is thewidth of the MOST energetic photoelectrons on the screen (width =distance between central maximum and first destructiveinterference)?
Thank you.
