Problem 20CQ

Is there any measurable difference between the momentum of a photon and the momentum of matter?

Solution 20CQ

Matter is something that has mass and occupies space whereas photons are massless particles. Both matter and photons exhibit wave-particle duality but there is a measurable difference between their momentums.

Since matter has mass so its momentum p is given as

Here m is the mass of an object and v is the velocity.

Since photons are massless particles still they have momentum p which is given as

Here h is the Planck’s constant and is the wavelength of light.