Find Tmin for J=1 to J=0 and J=2 to J=1

[jen21]

1. Find Tmin (minimun temp) for J=1→J=0 and J=2→J=1
2. I was given the equation, Tmin=√h(J+1)/2k
3. This is probably really simple, but I don't understand the J=1→J=0 and in the equation there is only one J. I'm just not sure what to do, any help would be nice! Thank you!

 

[Basic_Physics]

What physical process does this equation refer to?
It seems you need to find the minimum temperature for 2 regions.
1 for J from 1 to 0 and the other for J from 2 to 1.
Normally one determine a minimum/maximum value of a function by setting the first derivative equal to 0.