Question

A wave has a wavelength of 6 mm and a frequency of 16 hertz. What is its speed?

Answer 1

The speed of the wave is 15 mm/s.

The frequency f and wavelength λ are related to one another and to the speed of the wave v by the formula

fλ=v

v = 15 mm × 4 s⁻¹ = 60 mm/s

Answer 2

Region Wavelength Frequency

Gamma 1 × 10-6 nm 3 × 1023 Hz

Gamma/X-ray 0.001 nm 3 × 1019 Hz

X-ray 1 nm 3 × 1017 Hz

X-ray/Ultraviolet 10 nm 3 × 1016 Hz