###### Asked in PhysicsElectromagnetic RadiationWaves Vibrations and Oscillations

Physics

Electromagnetic Radiation

Waves Vibrations and Oscillations

# What equation relates frequency and wavelength and speed of light?

## Answer

###### Wiki User

###### May 06, 2013 4:58AM

(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.

## Related Questions

###### Asked in Physics

### If the wavelength of light is shorter does it have more energy?

A high energy light will have a shorter wavelength than a low
energy light. If the wavelength goes down, then the frequency goes
up. When calculating energy in the equation, E=hv, frequency (v) is
the variable, not the wavelength. So in the equation, if you wanted
a more energy (E), you would have the frequency be large. For the
frequency to be big, then the wavelength has to be low.

###### Asked in Energy

### Does higher energy light have longer or shorter wavelength than lower energy light?

A high energy light will have a shorter wavelength than a low
energy light. If the wavelength goes down, then the frequency goes
up. When calculating energy in the equation, E=hv, frequency (v) is
the variable, not the wavelength. So in the equation, if you wanted
a more energy (E), you would have the frequency be large. For the
frequency to be big, then the wavelength has to be low.

###### Asked in Chemistry

### Is the shorter the wavelength the greater energy?

A high energy light will have a shorter wavelength than a low
energy light. If the wavelength goes down, then the frequency goes
up. When calculating energy in the equation, E=hv, frequency (v) is
the variable, not the wavelength. So in the equation, if you wanted
a more energy (E), you would have the frequency be large. For the
frequency to be big, then the wavelength has to be low.

###### Asked in Physics

### What is the relationship between energy of a photon and its wavelength?

###### Asked in Energy

### Does the energy increaes or decrease as wavelength increases?

###### Asked in Physics

### What is one wavelength of light?

###### Asked in Physics, Chemistry, Energy

### What wavelength possesses the greatest energy value?

The shortest wavelengths have the most energy because it has the
highest frequency. A high energy light will have a shorter
wavelength than a low energy light. If the wavelength goes down,
then the frequency goes up. When calculating energy in the
equation, E=hv, frequency (v) is the variable, not the wavelength.
So in the equation, if you wanted a more energy (E), you would have
the frequency be large. For the frequency to be big, then the
wavelength has to be low.

###### Asked in Physics

### Does UV light have the highest energy?

The shortest wavelengths have the most energy because it has the
highest frequency. A high energy light will have a shorter
wavelength than a low energy light. If the wavelength goes down,
then the frequency goes up. When calculating energy in the
equation, E=hv, frequency (v) is the variable, not the wavelength.
So in the equation, if you wanted a more energy (E), you would have
the frequency be large. For the frequency to be big, then the
wavelength has to be low. So no UV light doesn't have the most
energy Gamma rays do though.

Load More