Two sides of a parallelogram are in the ratio 5 : 3. If its perimeter is 64 cm, find the lengths of its sides.
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When an electron stops, it emits a photon with energy equal to the kinetic energy lost by the electron:
The energy of the photon is
where 
is the Planck constant and f is the frequency. Therefore, the maximum frequency of the emitted photon occurs when the loss of kinetic energy is maximum.
The maximum loss of kinetic energy of the electron occurs when the electron stops completely, so it loses all its energy:
Keeping in mind that
, we have
And so, this corresponds to the energy of the emitted photon, E. Therefore, we can find the maximum frequency of the emitted photon:
The energy of the photon is
The maximum loss of kinetic energy of the electron occurs when the electron stops completely, so it loses all its energy:
Keeping in mind that
And so, this corresponds to the energy of the emitted photon, E. Therefore, we can find the maximum frequency of the emitted photon:
Answer:
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