Doppler effect
A moving siren and a moving listener. Watch circular wavefronts bunch up ahead of the source and stretch behind it, compare the observed frequency with f′ = f (v ± v_o)/(v ∓ v_s), and see the shock cone beyond Mach 1.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 14. Waves |
| NCERT section | 14.8 (Doppler effect) |
| Level | NEET level |
| Time | about 12 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: Doppler · wavefronts · frequency shift · Mach cone · sound
More from this chapter
- Beats from two close frequencies
- Melde's experiment: standing waves on a string
- Resonance tube (open and closed organ pipes)
- Resonance tube: speed of sound and end correction
- Sonometer: frequency, tension, length laws
- Sound intensity, inverse-square law and decibels
- Standing waves on a string and Melde's experiment
- Transverse and longitudinal waves on a medium