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Intensity Amplitude Relationship

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Q. 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.

Q. Equations of a stationary waves and a travelling wave are

y_{1} = a \times s i n k x \times c o s ω t

y_{2} = a sin (ω t - k x)

. The phase difference between two points

x_{1} = \frac{π}{3 k}

x_{2} = \frac{3 π}{2 k} i s ϕ_{1}

for the first wave and

ϕ_{2}

for the second wave. The ratio

\frac{ϕ_{1}}{ϕ_{2}}

Q. Equations of a stationary wave and a travelling wave are

y_{1} = a s i n k x c o s ω t

y_{2} = a s i n (ω t - k x)

. The phase difference between two points

x_{1} = \frac{π}{3 k} a n d x_{2} = \frac{3 π}{2 k} i s ϕ_{1}

for the first wave and

ϕ_{2}

for the second wave. The ratio

\frac{ϕ_{1}}{ϕ_{2}}

Q. For constructive superposition of waves, phase difference between the waves should be equal to .......................

Q. For destructive superposition of waves, the phase difference between the waves should be equal to .......................

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