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

Question

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

anonymous · Answer

do you know what is the expression for fringe width?

anonymous · Answer

no.

anonymous · Answer

not off the top of my head at least

anonymous · Answer

lol.. without that you can't solve this :P.. go study what the equation is first :P

anonymous · Answer

I'll go search for it through lessons. *insert bored voice* (been doing nothing but English and Physics all week, just about burnt out)

anonymous · Answer

(I swear I fried my brain)