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QuestionPhysics

How do you convert a wavelength of 500 nanometers into energy in joules?
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Answer

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Step 1:
I'll solve this problem step by step using the appropriate LaTeX formatting:

Step 2:
: Recall the relationship between wavelength and energy

- $$\lambda$$ is the wavelength
The energy of a photon is given by the Planck-Einstein relation: Where:

Step 3:
: Convert wavelength to meters

\lambda = 500~\mathrm{nm} = 500 \times 10^{-9}~\mathrm{m}

Step 4:
: Substitute values into the equation

E = \frac{(6.626 \times 10^{-34}~\mathrm{J \cdot s})(3.00 \times 10^{8}~\mathrm{m/s})}{500 \times 10^{-9}~\mathrm{m}}

Step 5:
: Calculate the energy

E = \frac{(6.626 \times 10^{-34})(3.00 \times 10^{8})}{500 \times 10^{-9}} = 3.98 \times 10^{-19}~\mathrm{J}

Final Answer

3.98 \times 10^{- 19}~\mathrm{J}