What are the equations for wavelength and frequency of light?

Answer 1

The speed of light is fixed and so the wavelength and the frequency of light are related like this:
wavelength * frequency = speed of light
You just have to be careful your units match up. Often wavelengths of light are listed in nanometers, or nm, while the speed of light is often given in meters per second, or m/s. Make sure everything is in terms of meters or your answer will be way off. Frequency is almost always given in terms of 1/seconds, which is also called a Hertz. See the Web Links for more information about the electromagnetic spectrum.

Answer 2

E=hv

E, is the energy, in joules, H, is a fundamental physical

of a quantom of radiation. constant now known as Plank's

constant; h=6.626x10(to the power of -34)

V, is the frequency, in s-1, of the

radiation emitted.

Answer 3

Wavelength lambda and frequency f are connected by the wave speed c of the medium. c can be air = 343 m/s at 20 degrees celsius or water at 0 dgrees = 1450 m/s. c can be light waves or electromagnetic waves = 299 792 458 m/s. The formulas are: c = lambda x f f = c / lambda lambda = c / f

Answer 4

The equation is c=wf where c is the speed and w is the wavelength and f is the frequency.

The speed of electromagnetic radiation is c= 3E8 meters/second in space.

Answer 5

(Frequency) x (Wavelength) = Speed of light.

Note carefully that the "speed of light" in the equation above is the speed of light in the medium that the wavelength is measured in. In vacuum it will be the famous constant "c", but when light travels through any sort of material it's speed is slowed and its wavelength shortened by a factor called the refractive index of the medium. Because wavelength and speed are reduced by the same factor the equation still holds. Light's frequency is not affected by the medium.

Answer 6

Wavelength * Frequency = 3*108 m/s (speed of light)

All electromagnetic radiation (such as radio waves) travel at the speed of light.

A more general equation would be:

Wavelength * Frequency = Propagation speed

Answer 7

For electromagnetic radiation . . .

Speed in the present medium = (wavelength in the present medium) x (frequency)

Wavelength = (speed) / (frequency)

Frequency = (speed) / (wavelength)

Answer 8

c = ƒ• λ, where c is the speed of light in a vacuum, 3.0 x 108m/s, f is the frequency in Hz, and λ is the wavelength in meters.

Answer 9

Speed c=fw, where f=freq and w=wave.