Adiffraction grating with 240 lines per mm is used in an experiment to study the visible spectrum of a gas discharge tube. at what angle from the beam axis will the third order peak occur if the tube emits light with wavelength of 511.3 nm?

ammonium chloride & tallow

i think the answer would be reserve.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.