Cuesta College, San Luis Obispo, CA
Students find their assigned groups of three to four students, and work cooperatively on an in-class activity worksheet on different spectrum types and Kirchhoff's laws, and on the Doppler effect.
Showing posts with label spectroscopy. Show all posts
Showing posts with label spectroscopy. Show all posts
20130610
Astronomy in-class activity: Kirchhoff's laws
Astronomy 210 In-class activity 14 v.13.06.10, fall semester 2013
Cuesta College, San Luis Obispo, CA
Students find their assigned groups of three to four students, and work cooperatively on an in-class activity worksheet on different spectrum types and Kirchhoff's laws, and on the Doppler effect.
Cuesta College, San Luis Obispo, CA
Students find their assigned groups of three to four students, and work cooperatively on an in-class activity worksheet on different spectrum types and Kirchhoff's laws, and on the Doppler effect.
20090620
Infrared and ultraviolet light, made visible
http://www.flickr.com/photos/waiferx/3577304878/
Originally uploaded by Waifer X
Flickering infrared beam from DVD remote, while not visible to the naked eye, is detectable with a charged-coupled device (CCD) found in digital cameras. Video by Cuesta College Physical Sciences Division instructor Dr. Patrick M. Len.
http://www.flickr.com/photos/waiferx/3577276128/
Originally uploaded by Waifer X
"Invisible" ink puzzle on the back of a Milky Way bar Star Wars promotional package, normally not visible to the naked eye, but made visible when illuminated by an ultraviolet lamp, causing the ink to fluoresce in the visible spectrum. Video by Cuesta College Physical Sciences Division instructor Dr. Patrick M. Len.
20081020
Astronomy quiz question: continuous spectrum source
Astronomy 210 Quiz 4, Fall Semester 2008
Cuesta College, San Luis Obispo, CA
[4.0 points.] A continuous spectrum is caused by:
(A) blackbody radiation passing through diffuse, cool gas atoms.
(B) electrons moving to lower energy orbitals.
(C) hot, agitated electrons and atoms.
(D) the Doppler effect.
Correct answer: (C)
The electrons and atoms in a hot, dense, opaque object (a "blackbody") will emit a continuous spectrum.
Student responses
Section 70158
(A) : 10 students
(B) : 14 students
(C) : 41 students
(D) : 4 students
"Difficulty level": 63%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.55
Cuesta College, San Luis Obispo, CA
[4.0 points.] A continuous spectrum is caused by:
(A) blackbody radiation passing through diffuse, cool gas atoms.
(B) electrons moving to lower energy orbitals.
(C) hot, agitated electrons and atoms.
(D) the Doppler effect.
Correct answer: (C)
The electrons and atoms in a hot, dense, opaque object (a "blackbody") will emit a continuous spectrum.
Student responses
Section 70158
(A) : 10 students
(B) : 14 students
(C) : 41 students
(D) : 4 students
"Difficulty level": 63%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.55
20081017
Astronomy quiz question: absorption spectrum source
Astronomy 210 Quiz 4, Fall Semester 2008
Cuesta College, San Luis Obispo, CA
[4.0 points.] An absorption spectrum is caused by:
(A) the Doppler effect.
(B) hot, agitated electrons and atoms.
(C) electrons moving to lower energy orbitals.
(D) blackbody radiation passing through diffuse, cool gas atoms.
Correct answer: (D)
The electrons in the atoms in a cool, diffuse gas will absorb select wavelengths from a continuous spectrum source.
Student responses
Section 70160
(A) : 1 student
(B) : 11 students
(C) : 6 students
(D) : 13 students
"Difficulty level": 80%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.49
Cuesta College, San Luis Obispo, CA
[4.0 points.] An absorption spectrum is caused by:
(A) the Doppler effect.
(B) hot, agitated electrons and atoms.
(C) electrons moving to lower energy orbitals.
(D) blackbody radiation passing through diffuse, cool gas atoms.
Correct answer: (D)
The electrons in the atoms in a cool, diffuse gas will absorb select wavelengths from a continuous spectrum source.
Student responses
Section 70160
(A) : 1 student
(B) : 11 students
(C) : 6 students
(D) : 13 students
"Difficulty level": 80%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.49
20081015
Overheard: "ex-non"
Astronomy 210L, Fall Semester 2008
Cuesta College, San Luis Obispo, CA
(Overheard in astronomy laboratory, where students have to identify an unknown gas from observing their spectral lines.)
Student: "Ex-non." (I.e., xenon.)
Cuesta College, San Luis Obispo, CA
(Overheard in astronomy laboratory, where students have to identify an unknown gas from observing their spectral lines.)
Student: "Ex-non." (I.e., xenon.)
20080409
Astronomy quiz question: photon emission/absorption
Astronomy 10 Quiz 8, Spring Semester 2008
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q8.4
[Version 1]
Which one of the following choices best describes what will happen to an electron in an atom that emits a photon?
(A) Transform into a proton.
(B) Emit blackbody radiation.
(C) Undergo a redshift or a blueshift.
(D) Move from an inner to an outer orbital.
(E) Move from an outer to an inner orbital.
Correct answer: (E).
Student responses
Section 4160
(A) : 0 students
(B) : 3 students
(C) : 1 student
(D) : 5 students
(E) : 6 students
Section 5166
(A) : 0 students
(B) : 4 students
(C) : 3 students
(D) : 7 students
(E) : 9 students
[Version 2]
Which one of the following choices best describes what will happen to an electron in an atom that absorbs a photon?
(A) Transform into a proton.
(B) Emit blackbody radiation.
(C) Undergo a redshift or a blueshift.
(D) Move from an inner to an outer orbital.
(E) Move from an outer to an inner orbital.
Correct answer: (D).
Student responses
Section 4160
(A) : 0 students
(B) : 1 student
(C) : 2 student
(D) : 14 students
(E) : 1 students
Section 5166
(A) : 4 students
(B) : 3 students
(C) : 3 students
(D) : 14 students
(E) : 3 students
Cuesta College, San Luis Obispo, CA
Astronomy 10 learning goal Q8.4
[Version 1]
Which one of the following choices best describes what will happen to an electron in an atom that emits a photon?
(A) Transform into a proton.
(B) Emit blackbody radiation.
(C) Undergo a redshift or a blueshift.
(D) Move from an inner to an outer orbital.
(E) Move from an outer to an inner orbital.
Correct answer: (E).
Student responses
Section 4160
(A) : 0 students
(B) : 3 students
(C) : 1 student
(D) : 5 students
(E) : 6 students
Section 5166
(A) : 0 students
(B) : 4 students
(C) : 3 students
(D) : 7 students
(E) : 9 students
[Version 2]
Which one of the following choices best describes what will happen to an electron in an atom that absorbs a photon?
(A) Transform into a proton.
(B) Emit blackbody radiation.
(C) Undergo a redshift or a blueshift.
(D) Move from an inner to an outer orbital.
(E) Move from an outer to an inner orbital.
Correct answer: (D).
Student responses
Section 4160
(A) : 0 students
(B) : 1 student
(C) : 2 student
(D) : 14 students
(E) : 1 students
Section 5166
(A) : 4 students
(B) : 3 students
(C) : 3 students
(D) : 14 students
(E) : 3 students
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