how can we find the momentum of photon?
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Yes. Photons do have momentum.
You may be familiar with E=mc^2. But this is incomplete.
E^2= (mc^2)^2 + (pc)^2
Where m is the rest mass of the object in question.
P is it's momentum. And c well is the speed of light in vacuum.
Since photons have zero rest mass(fact). We can directly use the relation:-
E=pc
=> p=(E/c)
Since for a photon
E=hV =(hc/∆)
Where V is the frequency of the wave and
∆ it's wavelength.
h is planks constant.
From this we can clearly infer that photons have a momentum but no rest mass.
Also, if you have confusion between why light is attracted to black hole even though it has no mass that is because Gravity just cannot different between Energy (photons) and mass.
So in truth, Energy is actually mass and vice versa.
well a nice question....
You may be familiar with E=mc^2. But this is incomplete.
E^2= (mc^2)^2 + (pc)^2
Where m is the rest mass of the object in question.
P is it's momentum. And c well is the speed of light in vacuum.
Since photons have zero rest mass(fact). We can directly use the relation:-
E=pc
=> p=(E/c)
Since for a photon
E=hV =(hc/∆)
Where V is the frequency of the wave and
∆ it's wavelength.
h is planks constant.
From this we can clearly infer that photons have a momentum but no rest mass.
Also, if you have confusion between why light is attracted to black hole even though it has no mass that is because Gravity just cannot different between Energy (photons) and mass.
So in truth, Energy is actually mass and vice versa.
well a nice question....
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