Answer:
energy of photon=1.824ev
Step-by-step explanation:
given wavelength of ligt=6.8×10⁻⁷m=6800A⁰
energy of photon(E)=hc/λ;
and for simplicity
E=12400/λ
where λ is aken in angstorm
and energy in ev
E=12400/6800ev
E=1.824ev=energy of photon
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