Optics B/C

by **googlyfrog** on Sat Apr 30, 2011 7:08 pm

That's true. The only possible application optics-wise is the law of reflection. Other than that, it's good practice for trig...

by **Schrodingerscat** on Sat Apr 30, 2011 7:46 pm

It would be challenging, but I am not sure too challenging if we had to do it with prisms and refraction.

by **2win** on Sat Apr 30, 2011 10:56 pm

Programs are allowed? Niceeee, haha, my calc and my partner's calc are both armed and prepared then xD

And yeah, I'm practicing all this week and we have a template and a formula, just have to get used to putting things in place...

by **Bogoradwee** on Sun May 01, 2011 8:38 am

At states yesterday, they didn't cover the mirrors bahahaha. So we just plopped one down, and then guessed where the other would need to be, looked through the second, and adjusted

by **Sunshine Ninja** on Sun May 01, 2011 9:33 am

Our states were preety easy.... we only fumbled on one q about bright line spectrum.... came in 7th.....
for the laser shoot they chose the farthest far corner of the box.... so it took a min longer than norm to figure out where to put it... received a 29.5....

brobo's Userpage · by **brobo** on Sun May 01, 2011 7:27 pm

Sunshine Ninja wrote:Our states were preety easy.... we only fumbled on one q about bright line spectrum.... came in 7th.....
for the laser shoot they chose the farthest far corner of the box.... so it took a min longer than norm to figure out where to put it... received a 29.5....

What was the question?

by **DirkShmirk** on Wed May 04, 2011 10:07 am

googlyfrog wrote:Thank you.
If anyone has taken the Booth Invitational test, I noticed what I suspect is an error. It says "When a light source travels toward you at speeds close to the speed of light, the result is a red shift". Don't red shifts occur when a light source travels away from an observer, or am I wrong?

If you were listening you would have heard the instructor say that the question is invalid, seeing as they were reversed.

by **googlyfrog** on Wed May 04, 2011 5:56 pm

DirkShmirk wrote:
googlyfrog wrote:Thank you.
If anyone has taken the Booth Invitational test, I noticed what I suspect is an error. It says "When a light source travels toward you at speeds close to the speed of light, the result is a red shift". Don't red shifts occur when a light source travels away from an observer, or am I wrong?

If you were listening you would have heard the instructor say that the question is invalid, seeing as they were reversed.

I wasn't at the Booth Invitational. I just took the printed test, so I didn't have an instructor to tell me about the invalidity of the two questions.

by **DirkShmirk** on Mon May 09, 2011 4:14 pm

well in that case.... I guess you would be out of luck. PS good luck at Nats.

by **googlyfrog** on Mon May 09, 2011 4:22 pm

Thanks! Are you from Booth?

by **Gracie19** on Tue May 10, 2011 2:24 pm

Ummm I was confused about the laser shoot at the South Western PA regionals for Division B(I know it was a long time ago, but this has been bugging me). I thought that the mirror was supposed to be in a fixed position, and we adjusted the angle, but there we could put the mirror anywhere we wanted, at any angle we wanted, just as long as it was in the laser's path, which would be obvious to do anyways. Even so, it made the laser shoot easy, but I think that means that I spent a lot of wasted time thinking of a formula that would help.
Thoughts?

by **chalker** on Tue May 10, 2011 3:31 pm

Gracie19 wrote:Ummm I was confused about the laser shoot at the South Western PA regionals for Division B(I know it was a long time ago, but this has been bugging me). I thought that the mirror was supposed to be in a fixed position, and we adjusted the angle, but there we could put the mirror anywhere we wanted, at any angle we wanted, just as long as it was in the laser's path, which would be obvious to do anyways. Even so, it made the laser shoot easy, but I think that means that I spent a lot of wasted time thinking of a formula that would help.
Thoughts?

That's the way the rules intend the event to work. Look at rule 3.v. that says the mirror must be easily relocated on the LSS. (relocated is different from rotated)

by **tuftedtitmouse12** on Tue May 10, 2011 3:32 pm

that actually was my interpretation, but thank god my partner thought of it as YOU move the mirror, and asked the people at the science olympiad website for clarifications...also, there have been clarifications i think earlier in this thread

by **Infinity Flat** on Fri May 13, 2011 12:12 am

Has anyone had any questions regarding the physical cause behind the color of objects? (e.g. dissipative absorption, nonresonant scattering)
I was just reading about it, and was surprised I hadn't seen it on any tests.

by **tuftedtitmouse12** on Fri May 13, 2011 3:30 pm

hmm...for most tests, especially at state level, they don't really focus on part two, with the physical optics, but more about part one, with the geometric optics and all the math

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