Here's the question you clicked on:
AngelicDragon
Monochromatic light with a wavelength of 6.4 E -7 meter passes through two narrow slits, producing an interference pattern on a screen 4.0 meters away. The first order bright band lines is 2.0 E -2 meters away from the central bright maxima. What is the distance between the slits? 1.3 E -4 m 8.0 E -6 m 3.2 E -9 m 7.8 E3 m
do you know what is the expression for fringe width?
not off the top of my head at least
lol.. without that you can't solve this :P.. go study what the equation is first :P
I'll go search for it through lessons. *insert bored voice* (been doing nothing but English and Physics all week, just about burnt out)
(I swear I fried my brain)