Question:
a photon has an energy of 5*10^-11 erg. what is its wavelength
Answer:
Given that, E =5 x 10-11 eV.
E = hC/ λ
where, h is the Planck constant, c is the speed of light in vacuum and λ is the photon s wavelength.
As h and c are both constants, the photon energy changes with direct relation to wavelength λ.
E = 1/ λ
or, λ = 1/E = 1/5 x 10-11 =0.2 x 10-11 μm
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