what is the formula for frequency
The formula for frequency is: f (frequency) = 1 / T (period). f = c / Î» = wave speed c (m/s) / wavelength Î» (m). The formula for time is: T (period) = 1 / f (frequency). The formula for wavelength is Î» (m) = c / f Î» = c / f = wave speed c (m/s) / frequency f (Hz). The unit hertz (Hz) was once called cps = cycles per second. Choose: Speed of sound in air at a temperature of 20Â°C: c = 343 m/s or speed of radio waves and light in a vacuum: c = 299,792,458 m/s. The propagation speed of electrical signals via optical fiber is about 9/10 the speed of light, that is â 270,000 km/s.