To determine the energy of a photon, you can use the equation:
E = hc/λ
Where: E is the energy of the photon, h is the Planck's constant (approximately 6.626 x 10^-34 joule-seconds), c is the speed of light in vacuum (approximately 2.998 x 10^8 meters per second), and λ is the wavelength of the photon.
To calculate the energy of a photon with a wavelength of 7000 angstroms (7000 Å), you need to convert the wavelength to meters:
λ = 7000 x 10^-10 meters
Now, you can plug the values into the equation:
E = (6.626 x 10^-34 J·s) * (2.998 x 10^8 m/s) / (7000 x 10^-10 m)
Simplifying the expression:
E = 2.849 x 10^-19 joules
Therefore, the energy of a photon with a wavelength of 7000 angstroms is approximately 2.849 x 10^-19 joules.