Aline spectrum is produced when an electron moves from one energy level a. to a higher energy level b. to a lower energy level c. into the nucleus d. to another position in the same sublevel

A line spectrum is termed after the fact that radiation (light) emitted is made up of a series of crisp lines. The wavelengths of lines are unique to an element and can create extremely complex patterns, and the further discussion can be defined as follows:

Therefore, the final choice is "Option A" .

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no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.