# De-Broglie relations to compute the wavelengths and frequencies

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1. Wave-particle duality

Use the de-Broglie relations to compute the wavelengths and frequencies associated with

(a) a photon with energy of 1keV

(b) a ball of mass 10g moving with speed 10m/s

(c) a neutron with a kinetic energy of 0.05eV.

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##### Solution Summary

The expert uses De-Broglie relations to compute the wavelengths and frequencies.

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Please see the attached files.

De-Broglie relations for wavelength is:

(1.1)

Where p is the object momentum and h is Plank's constant.

The relativistic energy-momentum equation is:

(1.2)

For ...

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