Question

The most prominent line in the spectrum of magnesium is 285.2 nm. Other lines are found at 383.8 and 518.4 nm.

Answer 1

The energy of the  1 photon of the light with the wavelength of the most energetic line is 6.9 * 10^-19 J.

What is the energy of a photon?

We know that a photon can only be explained as simply as possible as a bundle of light. The photon is emitted from an atom when an electron in the atom is seen to move from a higher to a lower energy level thereby emitting light of the appropriate wavelength.

Now we can see that the wavelength that is the shortest is the one that would have the greatest energy. This is because the energy of the photon is inversely proportional to the energy of the photon.

Now we have';

Wavelength of the photon = 285.2 nm or 285.2 * 10^-9 m

Speed of light = 3 * 10^8 m/s

Plank's constant = 6.6 * 10^-34 J/s

Then;

E =  6.6 * 10^-34 J/s * 3 * 10^8 m/s/ 285.2 * 10^-9 m

E = 6.9 * 10^-19 J

Learn more about wavelength:brainly.com/question/13533093

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