Question

The hydrogen emission spectrum produces light at 430 nm (blue), 480 nm (blue-green) and 650 nm...

The hydrogen emission spectrum produces light at 430 nm (blue), 480 nm (blue-green) and 650 nm (red).

Find the energy in Joules and then in eV for a photon at each of these wavelengths:

430 nm:

480 nm:

650 nm:

A metal surface has a work function (W0) of 2.7 eV.  Of the three wavelengths of light in the hydrogen spectrum, which would be able to release electrons from the metal surface?

Calculate the kinetic energy in eV if any, of the electron freed by a photon of 430 nm wavelength. If no electron is released enter zero.

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