# How can photons have momentum?

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 2Sign up to view the whole answerSign up with email*

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.*

*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.*

*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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