Beats from two close frequencies
Two tuning forks of slightly different frequency. Hear the throbbing as a waveform: the envelope oscillates at f₁ − f₂. Change frequencies and amplitudes and read the beat frequency.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 14. Waves |
| NCERT section | 14.7 |
| Level | NEET level |
| Time | about 10 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: beats · superposition · interference in time · tuning fork
More from this chapter
- Doppler effect
- 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