Question 1

What is the difference between frequency and angular frequency?

Accepted Answer

Frequency (f) is cycles per second in Hz. Angular frequency (ω) is radians per second = 2πf. Angular frequency is used in AC circuit analysis and phasor calculations.

Question 2

How does wavelength change in different media?

Accepted Answer

Wavelength = velocity/frequency. In materials, wave velocity is slower than in vacuum, so wavelength is shorter. This is why fiber optic cables have velocity factor < 1.

Question 3

What frequency range is audible?

Accepted Answer

Humans hear approximately 20 Hz to 20 kHz. Below 20 Hz is infrasound, above 20 kHz is ultrasound. Radio frequencies start around 3 kHz and extend to 300 GHz.

Frequency Calculator - Period & Wavelength