Doppler Effect Receding Source Calculator

I want to calculate
Wave Velocity(v) = m/s
Wavelength Behind Source(λb) = m
New Frequency of Receding Source(f') = Hz
 

What is the Doppler Effect Receding Source Calculator?

The Doppler Effect Receding Source Calculator is a tool used to determine the observed frequency of a wave (such as sound or light) when the source of the wave is moving away from the observer.

Why use it?

  • To predict how sound or electromagnetic waves behave when the source moves away.
  • Used in radar technology, astronomy, medical ultrasound, and speed detection.
  • Helps analyze motion of objects emitting waves, such as stars, sirens, or vehicles.

How does it work?

The calculator uses the Doppler Effect formula for a receding source:

Since the source is moving away, the denominator increases, resulting in a lower observed frequency (the wave is stretched out).

When is it used?

  • When analyzing the drop in pitch of a siren as an ambulance drives away.
  • In astronomy, to detect redshift in light from distant galaxies.
  • In Doppler radar, to track objects moving away.
  • In medical imaging, for ultrasound Doppler scans.