3 Type the correct answer in each box. Spell all words correctly.
The part labeled A is a, and the part labeled B is a

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which description best characterizes the motion of particles in a solid?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit