What are three experimental findings could not be explained by EM theory
of light in photo electric effect. And write the Einstein’s hypothesis for these
experimental findings.
The wave length of the visible spectrum is approximately 400 nm (violet) to
700 nm (red). (a) Find the angular width of the first-order visible spectrum
produced by a plane grating with 600 slits per millimeter when white light
falls normally on the grating. (b) Do the first order and second order spectra
overlap? What about the second order and third order spectra? Does your
answer depend on the grating spacing?
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Experimental findings could not be explained by EM theory and Eisntein's Hypothesis are explained below
Explanation:
- In traditional electromagnetic theory, we could see the photoelectric effect would be assigned to the alteration of energy from the perpetual light waves to an electron.
- ejection of conduction electrons from conventional metals entails a few electron-volt (eV) light quanta, epistolizing to short-wavelength noticeable or ultraviolet light.
- On the footing of this 'heuristic principle', Einstein suggested the following most alloyed picture for the photoelectric effect.
- Thus Einstein's Hypothesis was: light-quantum transmits all of its energy to a single particular electron.
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