Both of a sound source and a listener are approaching towards each other with the same speed(c)/(10) (speed of sound in air = c) . What will be the percentage of apparent increase or decrease in frequency of sound ?

Both of a sound source and a listener are approaching towards each oth

1.	Both of a sound source and a listener are approaching towards each other with the same speed(c)/(10) (speed of sound in air = c) . What will be the percentage of apparent increase or decrease in frequency of sound ?
Answer» SOLUTION :Apparent frequency, ` n.= (c + u_(o))/(c- u_(S)) n ` So , apparent increases in frequency, ` n. - n = (u_(o) + u_(S))/(c - u_(S)) n ` ` therefore ` Percentage of change in frequency ` = (n.- n)/(n) XX 100 = (u_(O) + u_(S))/(c - u_(S)) xx 100` ` ((c)/(10)+ (c)/(10))/(c- (c)/(10)) xx 100 = 2/9 xx 100 = 22.2 % `