Interference, Refraction & Diffraction

Two tuning forks with similar frequencies; one fork is variable in frequency to tune beating.

What it shows:

The interference of waves from two tuning forks of slightly differing frequencies gives rise to beating, that is, a modulated wave of frequency.

ν_b...

What it shows:

Two loudspeakers, separated about 1.7 meters emit the same tone of frequency 500 Hz and produce a pattern of constructive and destructive interference.

How it works:

At this frequency, the successive positions of constructive interference...

Interference patterns of water waves generated by different sources at adjustable frequency.

What It Shows

Various wave phenomena demonstrated with water waves: circular waves from point sources, plane waves from an array of point sources, change of...