Consider a Hydrogen atom in the 3rd excited state (n = 4). The maximum wavelength of light that can be emitted is
9.7 x 10^-8 m
1.9 x 10^-6 m
1.03 x 10^-7 m
2.5 x 10^-5 m

The maximum wavelength of light that can be emitted is

Explanation:

= Wavelength of radiation

E= energy

For wavelength to be maximum, energy would be minimum, i.e the electron will jump from n=4  level to n =3

Using Rydberg's Equation:

Where,

= Rydberg's Constant  =

= Higher energy level = 3

= Lower energy level = 4

Z= atomic number = 1 (for hydrogen)

Thus the maximum wavelength of light that can be emitted is

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