A diffraction grating is 1.50 cm wide and contains 2000 lines. When used with light of a certain wavelength, a third-order maximum is formed at an angle of 20.0°. What is the wavelength (in nm)?

my brother just broke up with his girlfriend of 5 years and they were engaged and he had no idea it was coming

Explanation:

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kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.