Hi, im having alot of trouble with 2 questions for my physics class.Waves and sound are my weakest points and always struggle to complete a full question the first one is: 1)Visible light passes through a diffraction grating that has 900 slits per centimeter, and the interference pattern is observed on a screen that is 2.74m from the grating. In the first-order spectrum, maxima for two different wavelengths are separated on the screen by 3.22 . What is the difference between these wavelengths? 2)The frequency of the note Fsub4 is fsub F/. At what air temperature will the frequency be ? All help would be greatly appreciated. Thanks
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