Sound intensity, inverse-square law and decibels
Move away from a source and see I = P/4 pi r^2 and L = 10 log(I/I0); adding sources adds intensity not decibels.
About this experiment
| Subject | Physics |
|---|---|
| Class | 11 |
| Chapter | 14. Waves |
| NCERT section | 14.1 |
| 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: decibel · sound intensity · inverse square · loudness
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- Sonometer: frequency, tension, length laws
- Standing waves on a string and Melde's experiment
- Transverse and longitudinal waves on a medium