Create your own awesome maps

Even on the go

with our free apps for iPhone, iPad and Android

Get Started

Already have an account?
Log In

Doppler Effect by Mind Map: Doppler Effect
0.0 stars - reviews range from 0 to 5

Doppler Effect

2. Moving Source


Change in frequency of a wave for an observer moving relative to the source of the wave


1. Moving source approaching a stationary observer, the receive pitch will then become higher and vice versa

2. A moving observer approaching a stationary source, the reveived pitch will then become higher and vice versa

3. When both of the source and observer moving towards with each others, the received pitch will then become higher and vice versa


Moving source

Change of wavelength

Moving observer

Change of wave speed


1. Original wave equation: v = fλ

3. Moving Observer

4. General Form


Doppler Effect was proposed by an Austrian physicist Christian Doppler


Source moving towards observer

Sound wave has higher frequency

Source moving away from observer

Sound wave has lower frequency


When an ambulance is approaching, the whistle has a higher pitch than normal

Determine the speed of car by using radar gun

Gauge the line-of-sight velocities for stars