Pre-lab 10
			     ( At last......)
Lab meeting time:						Name:

	1. Write down the Balmer formula (mentioning what the symbols used 
	mean.) (3)














	2. What will you use in this experiment to observe the spectrum of 
	   hydrogen and of different gases ? Draw a digram explaining how it 
	   works.



























	3. What graph will you plot in this lab ? What will be the slope of
	   the graph ?