Longest wavelength that appears in the order


The spacing of ruled lines on a diffraction grating is 1770 nm. The grating is illuminated with a beam of white light containing the 400 nm to 700 nm wavelength range. In this case the entire third-order spectrum cannot reach the screen. The longest wavelength that appears in this order is:

A) 530 nm

B) 570 nm

C) 610 nm

D) 550 nm

E) 590 nm

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Physics: Longest wavelength that appears in the order
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