Plot the fine structure energy levels of the ion l (諐 for the principle quantum number n = 3 and n = 2. use the term symbols to denote these levels. (15%) hint: the energy levels of the hydrogen-like atoms are described by 3 川 +1/2 4 (b) it is known that the selection rules of quantum transition are given by how many spectrum lines are there in the allowed transitions in (a)(5%) and how many different frequencies of these transitions would appear? (5%)

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.