Photons are all-or-nothing entities: you cannot emit or absorb half a photon. (Remember that to detect a photon you have to...

Physics Narrative 14-16

Simple harmonic oscillators show resonance if they are forced to vibrate at their natural frequency. This is a phenomenon of...

Lesson 16-19

The two identical bottles vibrate at the same natural frequency. So when one vibrates and produces a note, this makes the...

At home 5-11 11-14

Rubbing the glass makes it vibrate at its natural frequency. Because the other glass is identical it has the same natural...

At home 5-11 11-14