The wave numberof electromagnetic radiation emitted during the transition of electron in between two levels of Li^(2+) ion whose principal quantum number is 4 and difference is 2 is :

The wave numberof electromagnetic radiation emitted during the transit

1.	The wave numberof electromagnetic radiation emitted during the transition of electron in between two levels of Li^(2+) ion whose principal quantum number is 4 and difference is 2 is :
Answer» `3.5R` `4R` `8R` `(8)/(9)R` ANSWER :2