Question

What is a wave's speed if it has a wavelength of 3.2x10^-7 m and a period of 2.8x10^-12s​

Answer 1

Answer: 1.1·10^5 m/s

Explanation: speed = wavelength · frequency v = λf and

frequency f = 1/T , in which T = period

Speed v= λ/T = 3.2·10^-7 m /2.8·10^-12 s = 114285,7 m/s