CBSE Class 11-science Physics Waves
Progressive WavesClassify 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 WavesObtain equation of speed of a traveling wave and of a transverse wave on a stretched string. Define and compare speed of sound in different media
Standing WavesIn 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 frequency
BeatsBeats : 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 EffectWhat is Doppler effect in sound waves? The apparent change in frequency heard by listener when the source is in motion