CBSE Class 11-science Answered

qus-(a) A incident wave is represented by: y=20 sin(2x-4t)
 
write the expression for reflected wave;-
1. from a rigid boundary
2.from an open boundary

(b) A particle is moving with S.H.M in a atraight line.
when the distance of the particle from the equilibrium position  has values y1 & y2, the corresponding values of velocities are u1, u2. show that the time period of oscillation is given by;-

t= 2 pi root over{[(y2)power2-(y1)power2]%[(u2)power2-(u1)power2]}