What is wave ?

What is phase difference between two waves, if the resultant amplitude due to their superposition is same as that of the waves?

What is phase difference,when longitudinal wave is reflected from rigid wall?

What is transverse stationary wave ?

What is velocity of sound wave ?

What is velocity of the wave ?

What is nature of waves on stretched sonometer wire ?

What is the wave number of a beam of light in air if its frequency is 14 xx 10^14 Hz .

What is the source of EM waves?

What is nature of light? Wave optics and particle nature of light are used to explain which phenomena of light respectively?

What is the approximate velocity of Tsunami waves?