A beam of 635 nm light is incident on a diffraction grating that has 340 grooves/mm. (a) Determine the angle of the second-order ray. (b) If the entire apparatus is immersed in water, what is the new second-order angle of diffraction? (c) Show that the two diffracted rays of parts (a) and (b) are related through the law of refraction, by calculating nsin(0) for each part. [for part (a)] [for part (b)]

A beam of 635 nm light is incident on a diffraction grating that has 340 grooves/mm. (a) Determine the angle of the second-order ray. (b) If the entire apparatus is immersed in water, what is the new second-order angle of diffraction? (c) Show that the two diffracted rays of parts (a) and (b) are related through the law of refraction, by calculating nsin(0) for each part. [for part (a)] [for part (b)]