A progressive wave is represented by y 10 text ... - JAMB Physics 2009 Question
A progressive wave is represented by ( y = 10 \text{Sin} (1000\pi t - \frac{\pi x}{34}) ) . two layers of the wave separated by 153cm have a phase difference of
A
2700
B
450
C
900
D
1800
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Correct Option: E
Correct Answer: Option E
Comparing y = 10Sin\( (1000\pi t - \frac{\pi x}{34} ) \\
\text{With } y = a \text{Sin }(net - kx)\
K = \frac{\pi}{34}, \text{and phase difference}\
J = KAC = \frac{\pi}{34} \times 1.53rad.\
\text{But} \pi rad = 180^0 \
\text{Therefore } \frac{1.53rad}{34} = \frac{1.53 \pi}{34} \times \frac{1}{\pi} \times 180^0 \
=8.1^0 )
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