The formula to calculate the wavelength (λ) from energy (E) is:
\[ \lambda = \frac{h \cdot c}{E} \]
Where:
Energy to wavelength is defined as the conversion of the total energy contained within a photon into the wavelength.
Example 1:
Using the formula:
\[ \lambda = \frac{6.6261 \times 10^{-34} \cdot 299792458}{3.0 \times 10^{-19}} \approx 6.6261 \times 10^{-7} \text{ m} \]
Example 2:
Using the formula:
\[ \lambda = \frac{6.6261 \times 10^{-34} \cdot 299792458}{5.0 \times 10^{-19}} \approx 3.973 \times 10^{-7} \text{ m} \]