Showing posts with label electromagnetic radiation. Show all posts
Showing posts with label electromagnetic radiation. Show all posts

20200211

Physics quiz archive: electromagnetic waves, polarization, reflection/refraction

Physics 205B Quiz 1, spring semester 2020
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01PxP7



Sections 30882, 30883 results
0- 6 :   * [low = 6]
7-12 :   **
13-18 :   *********
19-24 :   *********** [mean = 21.9 +/- 5.9]
25-30 :   ************ [high = 30]

20190211

Physics quiz archive: electromagnetic waves, polarization, reflection/refraction

Physics 205B Quiz 1, spring semester 2019
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01aN7u




Sections 30882, 30883 results
0- 6 :   * [low = 3]
7-12 :   ****
13-18 :   *******
19-24 :   ***************** [mean = 20.8 +/- 5.7]
25-30 :   ******** [high = 27]

20180205

Physics quiz archive: electromagnetic waves, polarization, reflection/refraction

Physics 205B Quiz 1, spring semester 2018
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01AM0l




Sections 30882, 30883 results
0- 6 :  
7-12 :   * [low = 9]
13-18 :   ****
19-24 :   **********
25-30 :   ************** [mean = 24.7 +/- 4.9] [high = 30]

20170206

Physics quiz archive: electromagnetic waves, polarization, reflection/refraction

Physics 205B Quiz 1, spring semester 2017
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01Om6A


Sections 30882, 30883 results
0- 6 :  
7-12 :   **** [low = 9]
13-18 :   **********
19-24 :   ******* [mean = 19.7 +/- 6.0]
25-30 :   ******* [high = 30]

20160209

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, spring semester 2016
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01sN0w



Sections 30882, 30883 results
0- 6 :   *** [low = 6]
7-12 :   **
13-18 :   ************
19-24 :   ****************** [mean = 20.7 +/- 6.1]
25-30 :   ******** [high = 30]

20150211

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, spring semester 2015
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01c0Co



Sections 30882, 30883 results
0- 6 :   *** [low = 6]
7-12 :   ***
13-18 :   ***********
19-24 :   ************************* [mean = 19.9 +/- 5.7]
25-30 :   ****** [high = 30]

20140213

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, spring semester 2014
Cuesta College, San Luis Obispo, CA
Sections 30882, 30883, version 1
Exam code: quiz01ksB4



Sections 30882, 30883 results
0- 6 :  
7-12 :   * [low = 9]
13-18 :   ***********
19-24 :   ****************** [mean = 22.6 +/- 5.0]
25-30 :   *********** [high = 30]

20130212

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, spring semester 2013
Cuesta College, San Luis Obispo, CA
Section 30882, version 1
Exam code: quiz01b3Es



Section 30882 results
0- 6 : * [low = 6]
7-12 : ****
13-18 : **************
19-24 : ************ [mean = 19.1 +/- 5.9]
25-30 : **** [high = 30]

20120716

Astronomy midterm handout: atmosphere transparency, H-R diagram

Astronomy 210 Midterm 2 cover sheet v.08.07.10, fall semester 2012
Cuesta College, San Luis Obispo, CA

Diagrams showing the transparency of Earth's atmosphere to different electromagnetic radiation wavelengths, and a Hertzsprung-Russell diagram of star luminosities/absolute visual magnitudes versus surface temperature/spectral types, and showing relative sizes compared to the sun.

20120208

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, spring semester 2012
Cuesta College, San Luis Obispo, CA

Section 30882, version 1
Exam code: quiz01pL2r
Section 30882 results
Quiz 1 results (max score = 30):
0- 6 :
7-12 : ** [low = 9]
13-18 : **********
19-24 : ***** [mean = 22.4 +/- 6.5]
25-30 : ************ [high = 30]

20110208

Physics quiz archive: electromagnetic waves, reflection/refraction

Physics 205B Quiz 1, Spring Semester 2011
Cuesta College, San Luis Obispo, CA

Section 30882, version 1

Section 30882 results
 0- 6 : 
7-12 :
13-18 : *** [low = 15]
19-24 : ** [mean = 22.9 +/- 5.3]
25-30 : *** [high = 30]

20090620

Infrared and ultraviolet light, made visible

090529-1090773
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.


090529-1090772
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.

20081006

Astronomy quiz question: telescope funding

Astronomy 210 Quiz 3, Fall Semester 2008
Cuesta College, San Luis Obispo, CA


[4.0 points.] Based on being able to detect its wavelength, and cost of location, which telescope should be funded?
(A) A gamma ray detector in Antarctica.
(B) An ultraviolet detector in the Mojave desert.
(C) A visible light telescope in the Chilean mountains.
(D) A radio telescope in space.

Correct answer: (C)

Gamma rays and ultraviolet waves cannot be detected at ground level, due to absorption of these wavelengths by the atmosphere. A visible light telescope on a mountain would be able to detect signals at much less cost than a radio telescope in space.

Student responses
Section 70158
(A) : 11 students
(B) : 15 students
(C) : 34 students
(D) : 11 students

"Difficulty level": 51%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.63

20081004

Astronomy quiz question: telescope funding

Astronomy 210 Quiz 3, Fall Semester 2008
Cuesta College, San Luis Obispo, CA


Based on being able to detect its wavelength, and cost of location, which telescope should be funded?
(A) A gamma ray detector in Antarctica.
(B) An ultraviolet detector in the Mojave desert.
(C) A near-infrared telescope on an aircraft.
(D) A radio telescope in space.

Correct answer: (C)

Gamma rays and ultraviolet waves cannot be detected at ground level, due to absorption of these wavelengths by the atmosphere. A near-infrared telescope on an aircraft would be able to detect signals at much less cost than a radio telescope in space.

Student responses
Section 70160
(A) : 6 students
(B) : 4 students
(C) : 19 students
(D) : 4 students

Success level: 63%
Discrimination index (Aubrecht & Aubrecht, 1983): 0.78

20080212

Astronomy clicker question: most dangerous photon

Astronomy 10, Spring Semester 2008
Cuesta College, San Luis Obispo, CA

Astronomy 10 learning goal M1.1

Students were asked the following clicker question (Classroom Performance System, einstruction.com) at the beginning of their learning cycle:

[0.3 points.] Which type of light ("electromagnetic radiation") particle is the most dangerous to be exposed to?
(A) A gamma ray photon.
(B) An x-ray photon.
(C) A microwave photon.
(D) (Each of these light particles (A)-(C) are equally dangerous.)

Correct answer: (A)

The energy of a photon is inversely dependent on wavelength; the gamma ray photon is the shortest wavelength of these photons, while the microwave photon has the longest wavelength. Many students explain picking gamma ray photons because of the origins of the Incredible Hulk. There may still be a concern with long-exposure to microwave photons, even though they contain the least amount of energy per particle, due to the number of photons involved.

Student responses
Section 4160
(A) : 19 students
(B) : 2 students
(C) : 1 student
(D) : 7 students

Section 5166
(A) : 26 students
(B) : 5 students
(C) : 3 students
(D) : 17 students