THE SPEED OF A TRAVELLING WAVE

Following statements which are true for light waves but not for sound waves are is (I) The speed of waves is greater in vacuum than in a medium (II) Waves of different frequencies travel with different speeds in a medium (III) Waves travel with different speeds in different media.

Assertion (A): When a light wave travels from rarer to denser medium, its speed decreases. Due to this reduction of speed the energy carried by the light wave reduces. Reason (R): Energy of wave is proportional to the frequency.

Energy OF travelling & standing waves

Waves|Waves Classification |Wave Length,Frequency & Speed |Travelling Wave Model

Waves|Waves Classification |Wave Length,Frequency & Speed |Travelling Wave Model

Waves|Waves Classification |Wave Length,Frequency & Speed |Travelling Wave Model

Is their any relationship between wave speed and the maximum partcle speed for a wave travelling on a string? If so, what is it?

A standing wave is formed by the superposition of two waves travelling in the opposite directions. The transverse displacement is given by y(x, t) = 0.5 sin ((5pi)/(4) x) cos (200 pi t) What is the speed of the travelling wave moving in the postive X direction ?

A standing wave is formed by the superposition of two waves travelling in opposite directions. The transverse displacement is given by y(x,t)=0.5 sin (5pi/4 x) cos (200 pi t) What is the speed of the travelling wave moving in the position x direction?

A string of length 2L, obeying Hooke's Law, is stretched so that its extension is L. The speed of the tranverse wave travelling on the string is v. if the string is futher stretched so that the extension in the string becomes 4L. The speed of transverse wave travelling on the string will be