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How can photons have momentum?

Answer 1

Photons have energy which means that they also have momentum.

The relationship between energy, momentum, and the speed of light is as follows: Photons have no mass and move at the speed of light.

#E=pc#

Where #E=(hc)/lambda#

#(hcancel(c))/lambda=pcancel(c)#

#p=h/lambda#

#h# is the Planck constant, #c# is the speed of light and #lambda# is the wavelength of the light and #p# is the momentum.

Thus, photons possess momentum due to their energy.

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Answer 2
Piper Hoffman
Since photons possess both particle and wave properties, they are described by the equation p = h/λ, where λ is the wavelength, p is momentum, and h is Planck's constant. Photons carry momentum proportional to their frequency and inversely proportional to their wavelength in accordance with quantum mechanics.
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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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