Optics B/C

quizbowl · Post by **quizbowl** » Sat Sep 03, 2011 6:03 pm

Infinity Flat wrote:
JSGandora wrote:How about for Division C?
It can't hurt to know it, but it's not something you should focus on.

You do have a binder, so its okay to put in really obscure things that you think might just come up.

Post by **smartkid222** » Sat Sep 03, 2011 7:20 pm

quizbowl wrote:
Infinity Flat wrote:
JSGandora wrote:How about for Division C?
It can't hurt to know it, but it's not something you should focus on.
You do have a binder, so its okay to put in really obscure things that you think might just come up.

Yeah, but somtimes it's hard to utilize something that's in the binder if you've never practiced with it before or done a sample problem.

JSGandora · Post by **JSGandora** » Sat Sep 03, 2011 7:24 pm

Well, as long as I know the equation it's fairly simple to plug in the numbers. But for conceptual things, that's a different story.

Post by **blue cobra** » Sat Sep 03, 2011 7:43 pm

I understand the Doppler Effect qualitatively, but could someone please help me understand how to do quantitative problems with it?

chalker · Post by **chalker** » Sat Sep 03, 2011 8:51 pm

blue cobra wrote:I understand the Doppler Effect qualitatively, but could someone please help me understand how to do quantitative problems with it?

Check out the Wikipedia page: http://en.wikipedia.org/wiki/Doppler_effect
It's got some good formulas and links to other sites that let you simulate it.

Post by **blue cobra** » Mon Sep 05, 2011 12:27 pm

chalker wrote:
blue cobra wrote:I understand the Doppler Effect qualitatively, but could someone please help me understand how to do quantitative problems with it?

Check out the Wikipedia page: http://en.wikipedia.org/wiki/Doppler_effect
It's got some good formulas and links to other sites that let you simulate it.

So do we use the formula for the Doppler Effect in classical physics:

$f=\left(\frac{v+v_r}{v+v_s} \right)f_0$

or must we adjust this because we are working with light, rather than sound?

Infinity Flat · Post by **Infinity Flat** » Mon Sep 05, 2011 1:14 pm

blue cobra wrote:
chalker wrote:
blue cobra wrote:I understand the Doppler Effect qualitatively, but could someone please help me understand how to do quantitative problems with it?

Check out the Wikipedia page: http://en.wikipedia.org/wiki/Doppler_effect
It's got some good formulas and links to other sites that let you simulate it.
So do we use the formula for the Doppler Effect in classical physics:

$f=\left(\frac{v+v_r}{v+v_s} \right)f_0$

or must we adjust this because we are working with light, rather than sound?

You only need to use the relativistic doppler equation when one of the objects is moving near the speed of light.

Post by **foreverphysics** » Sat Sep 10, 2011 1:26 pm

Is it true that this year, they're going to make Div B reflect on 2 mirrors for the Laser Shoot as opposed to 1?

chalker · Post by **chalker** » Sat Sep 10, 2011 3:22 pm

foreverphysics wrote:Is it true that this year, they're going to make Div B reflect on 2 mirrors for the Laser Shoot as opposed to 1?

Not true. You have the OPTION of using up to 5 mirrors, but nothing in the rules 'makes' you use 2.

Post by **foreverphysics** » Sat Sep 10, 2011 8:21 pm

chalker wrote:
foreverphysics wrote:Is it true that this year, they're going to make Div B reflect on 2 mirrors for the Laser Shoot as opposed to 1?
Not true. You have the OPTION of using up to 5 mirrors, but nothing in the rules 'makes' you use 2.

...That requires more thought than I had previously given it...better get my partner cracking...

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