How do you calculate a wavelength of light emitted when
theelcetron in doubly ionized lithium makes a transiton
frome12 to e8?

Wavelength of light emitted when  the electron in doubly ionized lithium makes a transition  from E12 to E8 is  

Explanation:

Using Rydberg's Equation for hydrogen and hydrogen like atom:

Where,

= Wavelength of radiation

= Rydberg's Constant

= Higher energy level  

= Lower energy level

We have:

The wavelength of the photon emitted when the hydrogen atom undergoes a transition is

the answer is:  

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