The Sun's surface temperature is 5800 K.

6.The Sun’s surface temperature is 5800 K. Using Figure 17-12 in the text book(8th or 9th editions) or slide 9 lecture 7, arrange the following absorption lines in the Sun’s spectrum from strongest to weakest and explain your reasoning: (i) neutral calcium; (ii) singly ionized calcium; (iii) neutral iron; (iv) singly ionized iron.