Two waves of amplitude 2A and A of same frequency and velocity propogate in same direction with same phase. Then resultant amplitude is
Resultant amplitude
\[ R= \sqrt{A^{2}+(2A)^{2}+ 2A.2A cos\theta} \]
As θ = 0º
R= A+2A=3A
Two waves of intensity I1 and I2 propagate in a medium in same direction. Then sum of maximum and minimum intensity is
\[ I _{max= }\left( \sqrt{I_{1}} +\sqrt{I_{2}}\right)^{2} \]
\[ I _{min = }\left( \sqrt{I_{1}} - \sqrt{I_{2}}\right)^{2} \]
\[ I _{max} + I _{min} = 2(I_{1} + I_{2})\]
Two waves of intensity ratio 9 : 1 produce interference then
\[ \frac{I _{max}}{I _{min} } = \]
No solution provided for this question.
A source of sound gives five beats per second when sounded with another source of frequency 100 s–1. The second harmonic of the source together with a source of frequency 205 s–1 gives five beats per second. What is the frequency of the source ?
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Ten tuning forks are arranged in increasing orderof frequency in such a way that any two nearest tuning forks produce 4 beats/sec. The highest frequency is twice of the lowest. Possible highest and the lowest frequencies are
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Two coherent sources of different intensities send waves which interfere. The ratio of the maximum intensity to the minimum intensity is 25. The intensities are in the ratio
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