# physics

Coherent light of frequency 6.30 1014 Hz passes through two thin slits and falls on a screen 75.0 cm away. You observe that the third bright fringe occurs at ±3.06 cm on either side of the central bright fringe.

(a) How far apart are the two slits?
I got --> .035 mm
(b) At what distance from the central bright fringe will the third dark fringe occur?
*Needs to be in cm

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