## Optics B/C

blue cobra
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### Re: Optics B/C

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?
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Infinity Flat
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### Re: Optics B/C

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.
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foreverphysics
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### Re: Optics B/C

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?

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chalker
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### Re: Optics B/C

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.

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foreverphysics
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### Re: Optics B/C

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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Gillen
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### Re: Optics B/C

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.

Is this true for Div C as well?

bearasauras
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### Re: Optics B/C

Yup

JSGandora
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### Re: Optics B/C

Do you get different points for using different numbers of mirrors?

chalker
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### Re: Optics B/C

JSGandora wrote:Do you get different points for using different numbers of mirrors?

Yes. More mirrors = more points.

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tuftedtitmouse12
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### Re: Optics B/C

chalker wrote:
JSGandora wrote:Do you get different points for using different numbers of mirrors?

Yes. More mirrors = more points.

ahhh
any strategies or hints people are willing to share?? but is the laser shoot pretty much the same concept for division b, with no obstacles? (sorry, haven't gotten the rules manual...)
peter, peter, peter

dallasq
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### Re: Optics B/C

Since using three barriers is a requirement and you know one is on the midline, then where are the other two?

wlsguy
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### Re: Optics B/C

dallasq wrote:Since using three barriers is a requirement and you know one is on the midline, then where are the other two?

I would say anywhere else on the LSS (as long as they are in the same locations for all teams)

chalker
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### Re: Optics B/C

dallasq wrote:Since using three barriers is a requirement and you know one is on the midline, then where are the other two?

Some clarification, to ensure that people don't get the wrong ideas:

1. 3 barriers is for C division. 1 barrier in B division.
2. It's not guaranteed to be on the midline in either case. The target point can now be ANYWHERE on the wall, not just the exact middle.

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zyzzyva980
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### Re: Optics B/C

But there will be:
A) A line from the laser to the target and
B) A barrier on that line,
correct?
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rocketman1555
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### Re: Optics B/C

That is what it looks like.
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