Question

one musical instruments has frequency 90 Hz velocity of source=1/10th of the velocity of light .................... (NEET ) see the image

Answer 1

hey mate here is ur answer {c}

hope it helps you

Answer 2

f = 90Hz

f' = (v-vo)/(v-vs) X f

$f' = \frac{v}{v-\frac{v}{10} } 90$

f' = 10/9 X 90

f' = 100 Hz