A laser with wavelength 490 nm is shone through a double-slit.The graph shows th

Question

A laser with wavelength 490 nm is shone through a double-slit.The graph shows the intensity pattern on a screen 2 m away.
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ttp://i32.photobucket.com/albums/d2/NikkiNik88/plotslits.png
What is the distance between the slits?

I tried using L/y =d L is 2m and y is 0.5 m ( I guess) But that's not right? A laser with wavelength 490 nm is shone through a double-slit.The graph shows the intensity pattern on a screen 2 m away.
h
ttp://i32.photobucket.com/albums/d2/NikkiNik88/plotslits.png
What is the distance between the slits?

I tried using L/y =d L is 2m and y is 0.5 m ( I guess) But that's not right?

Explanation / Answer

Well, you have the right formula, but I think you are using thewrong y. y is the distance between maximums which looks to beabout 1.2 m. Try that.

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