4/30 qod

Describe the precision of carbon dating.

--ch

4/29 Scheitlin

In physics class on Friday we had a sub and there were no papers to turn in. We were handed out two papers and they are both due on Monday if they were not finished in class. The first one was the background to the lab we will be doing on Monday, there were a few questions on the back that needed to be finished after you read the lab. The other paper was a reading guide with the packet the sub also handed out. During class we just worked on those two assignments. Overall it was a pretty relaxing class where people worked with who they wanted which to me looked like people just went back with old lab partners that they missed working with just like I worked with Carlie again.

qod- The difference between alpha and beta tracks is that the alpha ones will have thicker tracks than the beta ones.

4/27 qod

How will we know the difference in alpha particle tracks and beta particle tracks when we look in the cloud chamber?

-- ch

4/26

Explain the analogy with the 4 witches.

--ch

4/25 qod

How much nuclear radiation do you think you have been exposed to in your life?

--ch

4/24 qod

Why is the index of refraction never less than one?

--ch

04/23 Miley

This Monday started out as any other day in physics would, by turning in numerous amounts of homework, this including the Bling Project and Light Wave questions. After turning these in, Mr. Ebersole broke up our class into groups based on who was at school on Friday. He then explained that we needed to finish our labs from Friday and begin the camera dissection lab. Mr. Ebersole repeatedly reminded us all to make sure that the batteries were out of the camera in order to ensure our safety.  After our instructions each group worked on completing the labs assigned for the remainder of class. At the end of class Mr. Ebsersole told us that our only “homework” was to work on the test review and that tomorrow is our time to finish the labs and review for the test on Wednesday. This concluded our class. Even though this Monday was pretty ordinary one special thing happened in second period, we had a special guest. This guest happened to be one of Mr. Ebersole’s professors who were evaluating his performance so he could learn what he’s doing well as a teacher and where there is room for improvement. Though none of us really talked to this special guest, I noticed him admiring my Miami hoodie.

QOD: How can you measure the focal length of your disposable camera?

Though I am not certain, I believe that this is the answer. You would remove the lens, focus it on an image, and move it back & forth until the image becomes clear. Once the image is clear you can take a ruler to measure the distance. 

4/23 qod

How can you measure the focal length of your disposable camera?

--ch

4/20 qod

You are attacked by a gang of pirates.  They hold you at knife point and tell you that you will have to walk the plank, if you cannot solve a major problem for them.  They have a double convex lens and they need to know what the focal length is.  What do you do?

--ch

4/19 qod

How do the 3d glasses at the Rave work?

--ch

4/18 qod

How do fiber optics work?

--ch

Harrison 4/17

The first thing we did today was turn in the homework from last night (the refraction lab and the reflection and refraction questions). Then, we went over the textbook problems, p. 846 #1-11, 13-15,18.

We then began our presentations. My group went first, explaining why the sky is blue. Jasmine and Matthew were in the play and were unable to make it, but they made a fantastic video that we showed. Next, Charlie, Pat-the-Rat, Kyle, and Alexis presented why the ocean is blue. At the beginning of the next presentation, Kelly loudly shushed everyone, and was congratulated on a job well done by Coats-Haan. Then she, along with Austin, Emily, and Sachi, explained the reasons behind the green flashes at sunrise and sunset. Carlie, Chris, Onur, and Sonny gave a presentation on mirages.

The homework for tonight is a worksheet with Snell's Law problems.

QotD: My favorite presentation was the one about mirages. I had noticed them before while driving but had never realized that they occurred because the hot air next to the ground bends the light up. I also got a kick out of Onur's mannerisms up in front of the class, acting as if he was some kind of philosophy professor or something.

4/17 qod

Which presentation was your favorite?  What did you learn from it?

--ch

4/16 qod

Does light bend toward the normal or away from the normal when it enters a medium that is travels slower in than the initial medium?  Explain your answer.

--ch

4/13 qod

How can you make a one-eyed Jack look the other way?  Why does this work?

--ch

4/12 qod

What did Fermat's brainbuster have to do with our reflection lab?

--ch

4/11 Chao

Today in class, we were given a choice. We could either work on p. 179 – 186 on the remote sensing lab or if we finished the lab last night, we could work on our color presentation projects together. After turning in our color labs on p. 187 – 189, we set off to work. Some groups worked on the lab while other groups hopped on computers and decided to start looking up anything and everything about their designated topic.

Even though the day wasn’t as action-packed as the last two days, our group still managed to get some research into our designated topic: green flashes. Groups of people started congregating towards some computers to be with their teams. Our group stayed on four separate computers and emailed links to ourselves. Apparently green flashes are rare. With the weather and the clouds like it is in Ohio, we’ll probably rarely see one.

Anything of the remote sensing lab that we didn’t complete is homework. The color presentation is due next Tuesday. Rubrics are found on p. 191 of the lab manuel.

QOD: Why do telescopes that detect infrared radiation have to be located outside of the Earth’s atmosphere?
I’m not exactly sure about how to answer this but I’ll try. Because the Earth’s atmosphere is a thick blanket that shields us from ultraviolet waves and produces the greenhouse effect, much of the infrared radiation is absorbed by our atmosphere. Placing a telescope on high mountains would not serve our purpose in gauging infrared radiation because it is only able to measure a small part of the atmosphere. Putting telescopes in outer space can help us gauge the infrared radiation that the atmosphere absorbed on a much grander scale.

4/11 qod

Why do telescopes that detect infrared radiation have to be located outside of the Earth's atmosphere?



--ch

4/10 Back

Today in Physics we began class by turning in three worksheets: "Starlight, Starbright," the EM table and the Properties of Light guided reading. Afterwards, Mr. Ebersole did a color demonstration using red, blue and green neon tubes attached at an axis. When he spun the wheel, all of the colors mixed to form white. When he then taped off varying sections of each tube, different color combinations could be observed. Trevor made an interesting observation at our table. He said that the reason we hadn't seen purple very well was because Mr. Ebersole had taped the green tube too far down so that when the tubes spun, the centrifugal force of the liquid in the tubes consolidated at the outer side of the tube where the tape did not reach.
Following this demonstration, a presentation was introduced about light and color that is to be given on Tuesday, April 17, 2012. We were given the rubric and requirements necessary to prepare the presentation. Next we worked as a table on a lab about color. We began by putting different colored sheets of glass in front of a flashlight. Then, we switched off between answering questions from the packet we received in class and provided web links on the computer. Anything we did not complete was homework. Also, if we wished to get ahead and be able to work on our presentation the next day, pages 179-185 were to be completed in the lab manual.

QOTD: Why are there different primary colors for light than there are for pigments?

When combining light, red, blue and green are the primary colors. When combining pigments, the primary colors are magenta, yellow and cyan. This is because when combining pigments, light is absorbed and the result is always darker. When combining light, mixing red, blue and green will result in white, as we found in the color demonstration. However, mixing red, blue and green pigments will yield a dark brown.

4/10 qod

Why are there different primary colors for light than there are for pigments?

--ch

4/9 Armour

Today in physics, we received new teams, so we made our teammate farewells and got new blue sheets. Next, Coats-Haan heated up marshmallows in a microwave without the plate spinning, so we could determine the wave length. Then we found the speed of light using the given frequency and the wave length I measured. Since I measured the wave length, we all know our answer was very close to the accepted value. We could find the speed of light by using the equation v= wave length * frequency. After the in-class demonstration, Coats-Haan set us loose to work on Star Light, Star Bright (pp. 175-176), The Electromagnetic Spectrum (pp. 177-178), or Properties of Light reading (our homework).