Question 1

How do you calculate wavelength?

Accepted Answer

λ = v/f. For electromagnetic waves: λ = c/f where c = 3×10⁸ m/s. For sound: v ≈ 343 m/s.

Question 2

What is the wavelength of visible light?

Accepted Answer

Red: ~700 nm, Orange: ~600 nm, Yellow: ~580 nm, Green: ~530 nm, Blue: ~470 nm, Violet: ~400 nm.

Question 3

What's the relationship between frequency and wavelength?

Accepted Answer

They're inversely related: wavelength × frequency = wave speed. For sound in air: wavelength (m) ≈ 343 / frequency (Hz).

Question 4

Why use Hz vs RPM?

Accepted Answer

Hz (cycles per second) is universal for waves and oscillations. RPM (revolutions per minute) is more intuitive for rotating machinery and engines.

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