# Young's Double slit experiment (Finding the value for slit separation) [closed]

The question illustrates mono-chromatic red light passing through 2 slits and forming an interference pattern on the screen. The question then asks to suggest a suitable value for the slit separation.

How do I find a value for this or what basis should I approximate my answer?

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## closed as too localized by John Rennie, Waffle's Crazy Peanut, David Z♦May 27 '13 at 17:00

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I've added the homework tag. In the future, please use this tag on homework questions. –  Ben Crowell May 26 '13 at 20:03
this answer cannot be solved with this information! i am pretty sure you are going to need some information such as which angles dark or bright fringes appear. –  phaedrus May 26 '13 at 20:46
I think it should just be comparable to the wavelength $\lambda$ –  ABC May 27 '13 at 14:51