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Do electromagnetic waves carry energy and momentum ?

Tutor

Any type of particle or wave that is in motion carries momentum Electromagnetic waves like any other wave carry energy as they travel through empty space. If light didn't carry energy, it wouldn't be able to heat stuff up or generate photo current in photo cells.

Physics Tutor

Of course! Any type of particle or wave that is in motion carries momentum; either linear or angular, depending on the motion of the particle or wave. For example, an electron would have angular momentum as it revolves around the nucleus of an atom while a photon would have linear momentum as it travels... read more

Of course! Any type of particle or wave that is in motion carries momentum; either linear or angular, depending on the motion of the particle or wave.

For example, an electron would have angular momentum as it revolves around the nucleus of an atom while a photon would have linear momentum as it travels from this screen onto your retina.

The exact value of the momentum of a wave was given by Louis De Broglie in his De Broglie Equation in 1924 which says that:

pλ=hpλ=h

or

λ=hpλ=hp

Where λ is the wavelength of the wave, p is the momentum of the wave and h is Planck’s Constant (h=2π?h=2π?)

Tutor

Yes any type of wave under motion carries momentum and they also carry energy as they travel through empty space.

Teacher

Of course! Any type of particle or wave that is in motion carries momentum Electromagnetic waves like any other wave carry energy as they travel through empty space. If light didn't carry energy, it wouldn't be able to heat stuff up or generate photo current in photo cells.

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