In Example 10.3, what should the width of each slit be to obtain 10 maxima of the double slit pattern within the central maximum of the single slit pattern?

Explanation

We want `a theta=lambda, theta=(lambda)/(a)`
`10(lambda)/(d)=2(lambda)/(a)a=(d)/(5)=02mm`
Notice that the wavelength of light and distance of the screen do not enter in the calculation of a.