I have the follwoing question for prep for a lab, i have tried to work out the answer but i am struck with trying to work out the intensity at a certain point, in this case 4.1mm from the central maximum. I have tried using trig to calculate the angle to the point using trig then using(adsbygoogle = window.adsbygoogle || []).push({});

I=I(sin(angle/2)/(angle/2) all squared. Am i on the right track?

"..A diffraction pattern is formed on a screen 120 cm away from a 0.4 mm wide slit. Monochromatic light of 546.1 nm is used. Calculate the fractional intensity, I/I0 at a point on the screen 4.1 mm from the centre of the principal maximum..."

could some please point me in the right direction, thanks

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# Homework Help: Interference and Diffraction

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