7. One way to analyze E MR is to pass the radiation through a prism or a diffraction grating. This causes the radiation to separate into its component wavelengths, producing a spectrum. Depending upon the source, three types of spectra can be observed. For each of the following types of spectra, describe a possible source and indicate how this information could be used by astronomers.

a. continuous spectrum

b. absorption spectrum (dark-line spectrum)

6c) emission spectrum(bright-line spectrum)

8. Sketch a series of diagrams to show the main steps in the evolution of stars like the Sun.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true

where is the circuit diagram ?

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.