Light of a single frequency passes through two narrow slits and produces an interference pattern on a screen some distance away. The interference fringes are very close together.
Which change would increase the distance between the fringes?
1 )
Increase the brightness of the light source.
Increase the distance between the slits and the screen.
3 )
Increase the distance between the two slits.
4 )
Increase the frequency of the light used.
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