Exam 3: Light and Matter: the Inner Workings of the Cosmos

As they move through space, the vibrating electrical and magnetic fields of a light wave must move perpendicular to each other.

Changing the electric field will have no effect on the magnetic fields of a body.

The element first found in the Sun's spectrum, then on Earth 30 years later, is

In a hydrogen atom, a transition from the 2nd to the 1st excited state will produce

What do infrared and ultraviolet waves have in common? How do they differ?

Explain how the Doppler effect has been used to detect invisible planets orbiting other Sun- like stars.

How can the Doppler effect be used to determine if a storm is forming into a tornado?

A binary star system is one with two stars orbiting each other. How can the Doppler effect be used to find binary stars whose orbital plane is along our line of sight and determine their periods?

The shorter a wave's wavelength, the greater its energy.

If a fire truck's siren is rising in pitch, it must be approaching us.

You would perceive a change in a visible light wave's amplitude as a change in its color.

If we increased the pressure in a gas, how will its spectral lines be affected?

An emission line results from an electron falling from a higher to lower energy orbital around its atomic nucleus.

The common element discovered in the Sun's spectrum before it was found here is .

The Sun's observed spectrum is

An FM station broadcasts at a frequency of 100 MHz. The wavelength of its carrier wave is .

Stars that appear blue or white in color are than our yellow Sun.

According to Wein's law, the larger the blackbody, the shorter its peak wavelength.

For hydrogen, the transition from the first to third excited state produces

The radiation our eyes are most sensitive to is the color