Question: A 485-nm light beam passes through a slit and forms a diffraction pattern on a screen (0.320 mathrm{~m}) from the slit. The (n=1) and (n=-1)

A 485-nm light beam passes through a slit and forms a diffraction pattern on a screen $0.320 \mathrm{~m}$ from the slit. The $n=1$ and $n=-1$ dark fringes are $22.4 \mathrm{~mm}$ apart on the screen.

(a) How wide is the slit?

(b) What is the greatest angle from the original beam direction at which a dark fringe occurs?

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a To determine the width of the slit we can use the singleslit diffraction formula w sintheta n lamb... View full answer

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