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14.Waves and Sound
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તરંગનું સમીકરણ $y = 8\sin 2\pi (0.1x - 2t)\,cm$ હોય,તો $2\,cm$ અંતરે રહેલા કણ વચ્ચે કળા તફાવત ............. $^\circ$ માં શોધો.
A
$18$
B
$36$
C
$54$
D
$72$
Solution
$y = 8 \,sin \,2\pi \,\left( {\frac{x}{{10}} – 2t} \right)$
$y = a \,sin \,2\pi \,\left( {\frac{t}{T}\, – \frac{x}{\lambda }} \right)$
$\lambda = 10\,cm$
Phase Difference $= \frac{{2\pi }}{\lambda }\, \times \,$ path difference $= \frac{{2\pi }}{{10}} \times 2\, = \,\frac{2}{5} \times \,180^\circ \,= 72^°$
Standard 11
Physics
