The green line of gaseous mercury at 546nm fals on a double-slit apparatus.
If the fifth dark fringe is at 0.150 degree from the centerline, what is the slit separaton?
d sin (theta) = m* lambda
The Attempt at a Solution
ok i used the above equatiob to find the d, slit separation
but im getting the wrong answer....and im not able to figure out the problem....plez