Photoelectric Effect and Line Spectra (4E)
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QUESTION
Identify the photon with higher energy: one with
λ
=
400
nm
\lambda=400\ \text{nm}
λ
=
400
nm
or
λ
=
800
nm
\lambda=800\ \text{nm}
λ
=
800
nm
.
QUESTION
Identify the photon with higher energy: one with
λ
=
400
nm
\lambda=400\ \text{nm}
λ
=
400
nm
or
λ
=
800
nm
\lambda=800\ \text{nm}
λ
=
800
nm
.
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ANSWER
λ
=
400
nm
\lambda=400\ \text{nm}
λ
=
400
nm
photon has higher energy. Photon energy inversely proportional to wavelength, so shorter
λ
\lambda
λ
has higher energy.
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