This question really has me stumped..i would appreciate it if anyone could help me out(adsbygoogle = window.adsbygoogle || []).push({});

White light containing wavelengths of 400nm to 750 nm is shone normally onto a diffraction grating of 3000 lines/cm. Calculate the width of the spectrum that appears as the second antinode on a screen that is 100 cm away.

Is there a specific formula I can use to solve the question? If so then please help.. thanks

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# White Light

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