Calculate the energy associated with one photon of the radian of wavelength 4000Å.

Explanation

To calculate the energy associated with one photon of radiation with a wavelength of 4000 Å (angstroms), we can use the formula for the energy of a photon:

\[ E = \frac{hc}{\lambda} \]

Where:
- \( E \) is the energy of the photon,
- \( h \) is Planck's constant (\( 6.626 \times 10^{-34} \) Joule seconds),
- \( c \) is the speed of light (\( 3 \times 10^{8} \) meters per second),
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