Exam 6: Atoms and Spectra

Diagram 6-2 Diagram 6-2 illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an absorption spectrum?

In the above image of a glowing gas cloud, you mainly see the color pink. Which spectra would you mostly expect from this gas cloud?

The process of removing an electron from a stable nucleus is known as ____________________.

An atom is ionized if one of its electrons jumps to a higher energy level in the atom.

Each element has its own set of characteristic absorption lines because

______________ will give you information on the surface temperature of the star after you obtain the wavelength of maximum emission from the ________________ spectra.

In the above model of an atom, where would the proton be located?

The higher the surface temperature of the star, the _______________ the wavelength of maximum intensity and the ____________ total radiation emitted from surface per second.

Where are neutrons found in the hydrogen atom?

The Kelvin temperature scale is measured in degrees.

If one star has a temperature of 4000 K and another star has a temperature of 40,000 K, how much more energy per second will the hotter star radiate from each square meter of its surface? ____________________

The radiation emitted from a star has a maximum intensity at a wavelength of 500 nm. What is the temperature of this star?

If a star is moving ____________ from us, then its spectra will be shifted toward ________ wavelengths, producing a redshift.

In the above model of an atom, draw a transition from the first excited state to the third excited state. Then draw a transition from the third excited state to the second excited state. Then draw a transition from the second excited state to the first excited sate. To draw these, draw the electron's motion as a line with an arrow to indicate direction and draw the photon as a wave with an arrow to indicated direction. Label the electron and photon. Label whether this is an absorption, emission, or continuous spectrum.

Figure 6-1 A plot of the continuous spectra of five different stars is shown in Figure 6-1. Based on these spectra, which of the stars has the lowest temperature?

The ____________________ of a star can be determined from its color.

Which spectrum is shown above?

Describe two ways in which an atom can be excited.

In the above model of an atom, draw a transition from the second excited state to the first excited state. To draw this, draw the electron's motion as a line with an arrow to indicate direction and draw the photon as a wave with an arrow to indicated direction. Label the electron and photon. Label whether this is an absorption, emission, or continuous spectrum.

You would like to know if a star is coming towards you or away from you. Therefore, you will need to obtain the star's _______________ from its shifted spectra.