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A light source is directed into a 100x100 mm diffraction grating at an agle of 20...

A light source is directed into a 100x100 mm diffraction grating at an agle of 20 degrees relative to the grating's normal. The grating has a ruling density of 1200 lines/mm. A 100 cm long screen is placed 50 cm from the grating and the dispersed spectrum is displayed on the screen. The screen is placed so it is directly in front of the grating. You observe the visible spectrum that runs from 400 nm to 800 nm.

Calculate the position of the different wavelengths of light and sketch the spectra that you will observe on the screen for all orders that appear (n=-1, 0, 1, and some of 2).

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