06-04_task (1)
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School
University of Texas *
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Course
2302
Subject
Astronomy
Date
Dec 6, 2023
Type
Pages
6
Uploaded by MegaThunderBadger24
Earth and Space Science © ACCESS Virtual Learning 2022
Name:
Evan Swai
Date:
School:
Facilitator:
6.04 Spectral Signature Lab (59 Points)
Use your lesson and the linked resources to answer the questions below.
1.
What is the difference between a continuous spectrum, a bright line spectrum, and an
absorption spectrum?
Write your response below:
Continuous spectrum is a spectrum of light that has all the colors of the rainbow
without any interruption. A bright line spectrum is a spectrum consisting of bright lines on a
dark background. An absorption spectrum is a spectrum with dark lines on a continuous
background. The dark lines represent the absorption of specific wavelengths of light by the
atoms in the gas.
2.
Compare the unknown sample to those of elements A, B, C, D. Which elements are
found in the star and explain how you know by describing the color that the line(s) would
be. Assume that the right side of the diagram is at 700 nm or the red end of the spectrum.
"To Identify an Unknown Element"
by
Tony Mangiacapre
Write your response below:
To compare the unknown sample with elements A, B, C, and D, we need to look for
the lines in the unknown sample that match the lines in the known elements. By comparing
Earth and Space Science © ACCESS Virtual Learning 2022
the lines, we can determine which elements are present in the unknown sample. The color of
the lines in the spectrum depends on the element being observed.
3.
Launch the interactive. Select
Astronomical Uses
at the bottom. Select
Radio
. What
types of information are collected from radio waves and what is the temperature of these
objects?
Write your response below:
Radio waves are used to collect information about the temperature and composition of
astronomical objects. Radio waves can penetrate dust clouds that visible light cannot,
allowing astronomers to study the interiors of these objects.
4.
Close the info window for Radio Waves and select
Microwave
. What types of
information are collected from microwaves and what is the temperature of these objects?
Write your response below:
Microwaves are also used to study astronomical objects. They can provide information on
the temperature and composition of the objects. They are also used to study the cosmic
microwave background radiation, which is the remnant radiation from the Big Bang.
5.
Close the info window for Microwave and select
Visible
. What types of information are
collected from visible light and what is the temperature of these objects?
Write your response below:
Visible light is used to study the properties of astronomical objects. By analyzing the
spectrum of visible light, we can determine the temperature, composition, and motion of the
object.
6.
Close the info window for Visible and select
X-rays
. What types of information are
collected from X-rays and what is the temperature of these objects?
Earth and Space Science © ACCESS Virtual Learning 2022
Write your response below:
X-rays are used to study high-energy astronomical objects such as black holes and
supernovae. X-rays can provide information on the temperature and composition of these
objects.
7.
Go to Spectra of Gas Discharges (link located on task page). Scroll to the table at the
bottom. Which element has the greatest number of emission lines?
Hydrogen has the greatest number of emission lines, while helium has the fewest. The spectral lines
of hydrogen and helium are the same in that they are both found in the visible part of the spectrum.
However, the lines for hydrogen are much more numerous and closer together than the lines for
helium.
8.
Which element has the fewest number of emission lines?
The spectral lines of oxygen and carbon are the same in that they are both found in the visible part
of the spectrum. However, the lines for oxygen are more numerous and closer together than the
lines for carbon.
9.
Scroll to the top and look at the emission lines of hydrogen and helium. What is one way
that the spectral lines are the same and two ways that the spectra are different?
Write your response below:
Three differences between the Naked-Eye View and the Telescope View are
magnification, resolution, and sensitivity. The Telescope View provides a more detailed and
clearer image of the spectrum.
10. Look at the emission lines of oxygen and carbon. What is one way that the spectral lines
are the same and two ways that the spectra are different?
Write your response below:
The Spectrum at Analyzing Light: Spectrum of the Star Altair is an absorption spectrum. The
part of the spectrum that has more lines is the blue end of the spectrum, while the part with
thicker/darker lines is the red end.
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