On: US Air Force shoots down drone swarm with THOR microwave weapon

[_x9du]

I don't understand that, given that momentum is mass times velocity. Can you explain?

[jameshart → _x9du]

For a photon, momentum is (edit) the inverse of its wavelength, times the Planck constant.

I appreciate that this is not really an ‘explanation’.

[mercutio2 → jameshart]

Momentum is proportional to frequency. Inversely proportional to wavelength.

[jameshart → mercutio2]

Thanks - corrected

[mercutio2 → _x9du]

Non-relativistic momentum is (simplified to) mass times velocity.

Photons have zero mass, but still have momentum, p=h/λ.

[denton-scratch → _x9du]

Mass == energy.