Question

An observer is moving towards statowards stationary source with velocity of v/3 then what is apparent frequency?

Answer 1

Explanation:

Given, n

′

=

100

80

×n,

v

s

=0,v=330 ms

−1

We know that,

n

′

=(

v−v

s

v−v

1

)n

⇒

100

80

×n=(

330−0

330−v

1

)n

=

100

80

=

330

330−v

1

⇒

100

80×330

=330−v

l

⇒v

l

=330−8×33

⇒v

l

=330−264

Velocity of the observer,

v

l

=66 ms

−1

.