Sanjeet asked: "the displacement of a particle in periodic motion is given by "y=(cos2t-2cost+2sin^2t+1). What is the no. of beats that can be heard in 10 seconds?"
Iqbal Lucky asked "when a wave enters from air to water, its wavelength changes but frequency remains unchanged. why" Answer Velocity of a wave = frequency x time period V = ν λ When a wave travels from one medium to another, its velocity changes and so also is its wavelength, but frequency; which is … Continue reading Wave travelling from one medium to another