Intense monoenergetic light source shines on piece of metal. When wavelength of the light is more...

Intense monoenergetic light source shines on piece of metal. When wavelength of the light is more than 620 nm, no photoelectrons are emitted from metal, and shorter wavelengths begin to produce a flux of photoelectrons. A 248 nm light source is aimed at the same metal, hitting the metal with a power of 0.75 W.

(a) What is the range of energies of photoelectrons produced?

(b) The electrons pass through a single slit, with slit width a= 150 nm and slit perpendicular to the incoming photoelectrons. The photoelectrons travel L=1.5 m before they hit a screen and form an interference intensity pattern. Due to diffraction, what is the width of the MOST energetic photoelectrons on the screen (width = distance between central maximum and first destructive interference)?

Thank you.

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genius_generous answered 11 months ago

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