Cuesta College, San Luis Obispo, CA
Students have a weekly online reading assignment (hosted by SurveyMonkey.com), where they answer questions based on reading their textbook, material covered in previous lectures, opinion questions, and/or asking (anonymous) questions or making (anonymous) comments. Full credit is given for completing the online reading assignment before next week's lecture, regardless if whether their answers are correct/incorrect. Selected results/questions/comments are addressed by the instructor at the start of the following lecture.
The following questions were asked on reading textbook chapters and previewing presentations on Kirchhoff's laws.
Selected/edited responses are given below.
Describe something you found interesting from the assigned textbook reading or presentation preview, and explain why this was personally interesting for you.
"I thought it was very interesting in the breakdown of rainbows. I have always been fascinated with rainbows and I myself always assumed a rainbow has seven colors and that my human eyes just couldn't pick up all seven. I was not aware until the reading that it does not always represent seven."
"Police radar guns measure the speed of cars in the same way astronomers measure the speed of stars."
"The Doppler effect because astronomers use it to conduct research on the sun."
"The Doppler effect. I liked how astronomers used it measure the speed of gases in the sun's atmosphere toward or away from Earth."
"I like knowing the term 'Doppler effect' as I knew the examples but necer knew what it was called."
Describe something you found confusing from the assigned textbook reading or presentation preview, and explain why this was personally confusing for you.
"I am confused on Spectras. I think I have the basic idea on the three types of spectra, but I need a more detailed explanation on how they work."
"At times I found it confusing regarding the absorption, emission, and continuous spectra."
"I don't really understand what a spectrum even is."
"I'm still not quite understanding which sources go with which spectra such as in the following questions. I understand the main idea but can't seem to put it into effect."
"One thing I found confusing is the blueshift and the redshift. I am confused on how to know which one is which."
I believe Pluto should be a planet. (Original responses.)
Strongly disagree. [0] Disagree. *** [3] Neutral. ***** [5] Agree. ***** [5] Strongly Agree. ** [2]
I believe Pluto should be a planet. (This is a follow-up question.)
Strongly disagree. * [1] Disagree. * [1] Neutral. **** [4] Agree. * [1] Strongly Agree. [0]
Briefly explain your answer to the previous question (whether Pluto should be a planet).
"It doesn't meet all of the qualifications that the other 8 planets of our solar system already pass."
"I'm neutral because Pluto has its pros and cons and I agree with some from both parts."
"I think it should be a planet because before dwarf planets, it was classified as a planet so why change it now."
"If it's orbiting the sun and its mass is big enough then it should be considered a planet."
"I think there are valid points for saying why Pluto should or shouldn’t be a planet but for me I really am find with how Pluto is."
"It does not follow the rules to be a planet. If we kept Pluto as a planet others would qualify as well and then we'd have a bunch of planets."
"Change is hard. Throughout all of my adolescence, I was taught in school that Puto is a planet. While at the same time, I am taught to trust scientific facts. At this time, it is hard for me to fully let go of Pluto being a planet, while I am trying to trust scientific facts. Ironically so, science changes all of the time. So who's to say in another 20 years, scientists and astronomers won't say, 'ah, we were wrong again! Pluto is accepted back in the planet gang!'" "
Match the spectrum type with their appearance.
(Only correct responses shown.)
Rainbow containing all colors: continuous [86%]
Rainbow with thin black lines: absorption [100%]
Colored lines on a black background: emission [86%]
Given off by hot, dense object: continuous [86%]
Given off by hot, diffuse gas atoms: emission [100%]
Passing through cool, diffuse gas atoms: [71%]
continuous; rainbow. **** [4] emission; series of bright lines on a dark background. * [1] absorption; series of dark lines on a rainbow background. * [1] (Unsure/guessing/lost/help!) * [1]
continuous; rainbow. **** [4] emission; series of bright lines on a dark background. * [1] absorption; series of dark lines on a rainbow background. * [1] (Unsure/guessing/lost/help!) * [1]
continuous; rainbow. [0] emission; series of bright lines on a dark background. ****** [6] absorption; series of dark lines on a rainbow background. [0] (Unsure/guessing/lost/help!) * [1]
continuous; rainbow. * [1] emission; series of bright lines on a dark background. [0] absorption; series of dark lines on a rainbow background. ***** [5] (Unsure/guessing/lost/help!) * [1]
continuous; rainbow. * [1] emission; series of bright lines on a dark background. ***** [5] absorption; series of dark lines on a rainbow background. * [1] (Unsure/guessing/lost/help!) [0]
starts loud, then gets quieter. [0] starts quiet, then gets louder. [0] starts quiet, gets louder, then goes back down to quiet. ******* [7] starts loud, gets quieter, then goes back up to loud. [0] (Unsure/guessing/lost/help!) [0]
Suppose you are standing on the sidewalk as a car, with its horn continuously on, passes by (video link, same as above). The pitch (high note/low note) of the car horn:
starts high, then drops lower. * [1] starts low, then goes higher. [0] starts low, goes higher, then drops back down to low. ****** [6] starts high, goes lower, then goes back up to high. [0] (Unsure/guessing/lost/help!) [0]
Ask the instructor an anonymous question, or make a comment. Selected questions/comments may be discussed in class.
"Can you please go over spectra in class, it's simple but its still a bit confusing."
"Will we learn more about the different types of spectrums because I am confused."
"Can we please go over Kirchhoff's laws?"
"What kind of equipment is used to capture a spectrum?" (Essentially just a prism to split light into its color components and project it onto a wall in a darkened room, and then you can look at it with your eye, or take a picture of it with a camera.)
"Funny how you managed to put The Lord Of The Rings into astronomy, and impressed how you did it as well."
"I remember a long time ago I ask myself why horns sounded different up close or far from you."
"Could you explain more into detail the difference between pitch and loudness. It was hard for me to distinguish the two in the horn video."
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