The two waves of same frequency moving in the same direction give rise to

The two waves of the same frequency moving in opposite direction give rise to

Can two waves of the same frequency and amplitude travelling in the same direction give rise to a stationary wave after superposition ?

Two photons of same frequencies moving in same medium have

Two photons of same frequencies moving in same medium have

Two parallel beams of positrons moving in the same direction will

Two parallel beams of positrons moving in the same direction will

Two parallel beams of positrons moving in the same direction will