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## Homework Statement

In a double slit experiment with slits 1. 10-5 m apart, light casts the first bright band 3.10-2 m from the center of a screen 0.65 m away what is the wavelength ?

## Homework Equations

dsin(theta) = (m +1/2)lambda,

## The Attempt at a Solution

I think to solve this problem I need the angle more to apply this formula

dsin(theta) = (m +1/2)lambda,

am I right, or maybe we can solve it without the angle ?

Thanks in advance