# Physics

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If the distance between two slits is .05mm and the distance to the screen is 2.5m find the spacing between the first and second order bright fringees for yellow light of wavelenght 600nm.

d=5x10^-5m
L=2.5m
wavelength= 6x10^-7m
x=?

x=wavelength*L/d
=(6x10^-7)(2.5)/5x10^-5m
=.03m

I am not sure if this is correct because the part where it states "first and second order bright fringes" confuses me. I am not sure if I am answering the question correctly. Is .03m too big?

• Physics -

You are right. 3 cm.

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