Astro- Lab 3 light and spectra

Sort the following atomic transitions by whether they would result in an omission line or in absorption line.

Emission: N=2>N=1 N=4>N=3 absorption: N=2>N=3 N=1>N=2 N=1>N=4

For each of the spectral lines indicated, pick the appropriate electron transition in the atom that is responsible for creating the spectral line.

Absorption spectrum (left to right): A, C emission spectrum (left to right): E, B, D

Match each spectrum with the location it was taken by the space probe.

Almost empty spectrum: focused on gas cloud almost full spectrum: focused on light through the gas cloud full spectrum: focused on light source

Given what you learned from the figure, rank these types of light in order of increasing energy.

From lowest to highest energy... Radio, infrared, orange, green, ultraviolet.

Sort these stellar objects by their peak wavelength. Not all objects are on the interactive, so determine the trend first, then sort the objects.

Highest (reddest) (top) to lowest (bluest)(bottom)... A brown dwarf with T=1000 K A K-star with T= 4400 K The sun, a G- star with T= 5800 K A F-star with T= 7000 K

Rank the following kind of light by wave link from longest wavelength (top) to shortest wavelength (bottom).

Infrared red visible light green visible light blue visible light ultraviolet

Label the following particles in the atom.

Negative charge: Electron no charge: neutron positive charge: proton

Match each spectral image to the physical explanation of that spectrum.

Normal spectrum: created by a dense material giving off light at all wavelengths almost full spectrum: caused by electrons in gas absorbing photons of specific wavelengths. Almost empty spectrum: caused by electrons in gas admitting photons of specific wavelengths

Use the image above to arrange types of electromagnetic radiation by wavelength.

Shorest to longest... GammaRay x-ray ultraviolet visible light infrared radio

What would observer to who does not see the star through the gas observe in the spectrum of the cloud of gas in the picture above? Select the appropriate spectrum below.

The all black spectrum with the yellow line.

Based on the time frames given in the above figure, which of the following are implications of the finite speed of light?

There would be a noticeable delay in communications at the speed of light between earth and astronauts on the moon. When we gaze at the Andromeda galaxy, we are looking back in time to the way it used to appear millions of years ago. If the light of the sun were suddenly extinguished, we wouldn't notice it from earth for over eight minutes.

Experiment with the interactive and determine which of the following trends are true or not.

True: the total power output goes up. Stars get bluer and the peak wavelength drops. False: the peak wavelength goes up. Stars get redder.

Rank the following kinds of light by frequency from highest (top) to lowest (bottom).

Ultraviolet blue visible light green visible light red visible light infrared