Dopleres Sound Effect

Question 1

New frequency when observer stationary and source moves TOWARDS the observer

Answer 1

n = n’ (v/v-vs)

Where vs- velocity is source
v-velocity of sound

Question 2

New frequency when observer stationary and source moves AWAY from the observer

Answer 2

n = n’(v/(v+vs))

Question 3

New frequency when source stationary and observer is moving TOWARDS the source

Answer 3

n’ = n( (v + vo)/v)

Question 4

New frequency when source stationary and observer is moving AWAY from the source

Answer 4

n’ = n( (v - vo)/v)

Question 5

New frequency when source and observer are moving TOWARDS each other

Answer 5

n’ = n( (v+vo)/(v-vs))

Question 6

New frequency when source and observer are moving away from each other

Answer 6

n’ = n( (v-vo)/(v+vs))

Question 7

New frequency when source and observer are moving in the same direction or perpendicular to each other

Answer 7

n’ = n

Question 8

In case the medium is also in motion then how is new frequency of sound calculated

Answer 8

Relative speed of sound is taken under consideration