Wavelength to Energy Calculator

Formula

To calculate the Energy from Wavelength (E):

\[ E = \frac{h \cdot c}{\lambda} \]

Where:

\(E\) is the Energy from Wavelength (Joules)
\(\lambda\) is the Wavelength (meters)
\(h\) is the Planck's Constant (\(6.626176 \times 10^{-34}\) joule-seconds)
\(c\) is the Speed of Light (\(299792458\) meters/second)

What are the Units for Energy from Wavelength?

The most common units for Energy from Wavelength are Joules. The energy calculated from the wavelength using the given formula is expressed in Joules, which is the SI unit of energy.

Example Calculation

Let's assume the following value:

Wavelength (\(\lambda\)) = \(500 \times 10^{-9}\) meters (500 nm)

Using the formula:

\[ E = \frac{6.626176 \times 10^{-34} \cdot 299792458}{500 \times 10^{-9}} = \frac{1.986445857 \times 10^{-25}}{500 \times 10^{-9}} = 3.972891714 \times 10^{-19} \text{ Joules} \]

The energy is approximately \(3.9729 \times 10^{-19}\) Joules.