# What is the energy of a blue light with a wavelength of 545 nm?

##### 1 Answer

The energy of one photon of that light is 3.65 x

#### Explanation:

To find energy, you must know the frequency of the light. Since we are given wavelength we can use this equation: c=

(545nm)(m/

Plug in c and wavelength

3 x

solve for v by dividing both sides by the wavelength

v= 5.50 x

Now that we have frequency, you can use the equation: E= hv where E is energy per photon, h is planck's constant which is 6.626 x

E= (6.626 x

seconds cancel out leaving you with

E = 3.65 x