Can an atom become excited by absorbing a photon of visible light?
Can an atom become excited by absorbing a photon of visible light? I have read that LED’s can be used to excite the hydrogen atom at a frequency of 1-65hz. If so, what wavelength (in NM’s) would the led be and how far could it excite the hydrogen atom?
An atom can be excited by a photon if and only if that photon carries the correct amount of energy to kick the atom into a higher energy level. So look up the hydrogen spectrum (in particular, the Lyman series, the transitions involving the ground state) to see the energies/frequencies/wavelengths of light that will work.
Of course, the energy of a photon is:
E = h * frequency = h * speed of light / wavelength,
where h is Planck’c constant.
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