Question

Asked Nov 7, 2019

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- A hydrogen atom absorbs a photon of UV light and its electron enters the n = 3 energy level. Calculate the change in energy of the atom and the wavelength (in nm) of the photon.

Step 1

Hydrogen atom absorbs UV radiation such that its electron gets excited from ground level and enters in 3^{rd} energy levels.

The change in energy level can be calculated by using the given formula.

Step 2

Substitute 1 for n1 and 3 for n2 in equation (1).

Thus, the change in energy is 1.936 × 10-18 J.

Now for this, the frequency will be-

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