CBSE Class 11-science Physics Waves
Progressive Waves
Classify waves on the basis of direction of motion of medium particles. Differentiate between transverse and longitudinal waves. Learn to write and interpret mathematical description of a wave.Behaviour of Progressive Waves
Obtain equation of speed of a traveling wave and of a transverse wave on a stretched string. Define and compare speed of sound in different mediaStanding Waves
In a linear medium that has two fixed ends or two free ends: Whole number of 1/2 wavelengths fit inside the medium and the overtones are whole number multiples of the fundamental frequency.
When we have one fixed end and one free end : An odd number of 1/4 wavelengths fit inside the medium and the overtones are odd multiples of the fundamental frequencyBeats
Beats : Periodic rise and fall in loudness that is heard when two sound waves of slightly different frequencies reach our ears simultaneously.
Beat frequency: Difference of frequencies of the two sources.
During the beats, the resultant sinusoidal wave has fluctuating amplitude that causes the varying loudness as a function of time.Doppler Effect
What is Doppler effect in sound waves? The apparent change in frequency heard by listener when the source is in motion
