Optics B/C

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Re: Optics B/C

Postby Unome » Mon Oct 10, 2016 8:33 pm

How similar is this year's LSS to the 2012 version? (is this still applicable?)
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Re: Optics B/C

Postby chalker » Mon Oct 10, 2016 10:55 pm

Unome wrote:How similar is this year's LSS to the 2012 version? (is this still applicable?)


The LSS is identical. That document is absolutely still applicable. The only significant change is the addition of a mirror to one of the barriers.

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Re: Optics B/C

Postby sciencekid7 » Wed Oct 12, 2016 5:28 am

Some questions about Optics B.

If the barrier is kept right up to the laser, obviously we cannot have a laser shoot since we need room between the laser and the barrier to position any mirrors as needed. What is the minimum distance between the side of the box with the laser and the barrier mirror?

Similarly, if the barrier is kept right up to the ruler, we cannot reach the target if it is near the barrier. What is the minimum distance between the barrier and the ruler?

Can the barrier mirror be parallel to the center line? Can the barrier mirror face the ruler instead of the laser?

Are the competitors allowed to lift or move the barrier in order to position templates or measuring devices and then place the barrier back in the same location and orientation?

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Re: Optics B/C

Postby SPP SciO » Wed Oct 12, 2016 4:50 pm

sciencekid7 wrote:Some questions about Optics B.

1. If the barrier is kept right up to the laser, obviously we cannot have a laser shoot since we need room between the laser and the barrier to position any mirrors as needed. What is the minimum distance between the side of the box with the laser and the barrier mirror?

2. Similarly, if the barrier is kept right up to the ruler, we cannot reach the target if it is near the barrier. What is the minimum distance between the barrier and the ruler?

3. Can the barrier mirror be parallel to the center line? Can the barrier mirror face the ruler instead of the laser?

4. Are the competitors allowed to lift or move the barrier in order to position templates or measuring devices and then place the barrier back in the same location and orientation?


My interpretation - I'm not an Optics pro but these are the relevant sections of the rules -

1, 2: Rule 3.c says "can be easily relocated anywhere in the LSS by the competitors." with regard to the mirrors. 3.h says "They must be fixed in the same position and orientation in the LSS for all teams." with regards to the barriers. So, I think that when the event supervisor sets the barrier, he or she would be free to glue them in place. However, they must take 3.c into account, and not place them so close to an edge as to exclude a mirror from being relocated there. Long story short, it will likely be reasonable.

3: Rule 3.g covers this - there will be one "somewhere along the midline to block the laser beam." Only in Div. C will there be 2 additional barriers; those barriers may well be "placed elsewhere" which certainly includes parallel to the midline. As far as the direction the mirror faces, "a mirror similar to the others attached to one side" does not specify, so it could be any direction.

4: 3.h - "Competitors must not adjust the mirror's position." Since the barrier in div. B will have the mirror, lifting or moving it would be considered an adjustment, so no. In div. C, it's not explicitly clear whether the other two barriers without the mirrors may be adjusted - however it's a safe bet to assume not, because the barriers "must be fixed in the same position" so I would treat them as if they were bolted into place.
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Re: Optics B/C

Postby kenniky » Fri Oct 14, 2016 3:53 am

Does anyone have a good source for studying optical absorption spectra?
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Re: Optics B/C

Postby deji725 » Sat Oct 15, 2016 1:34 am

I noticed that there was a kit for Optics. I'm kind of contemplating on whether I should buy it or not.Suggestions?

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Re: Optics B/C

Postby deji725 » Sat Oct 15, 2016 1:44 am

@kenniky
Im guessing you mean like for example "optical absorption spectra of a series of nanocrystal gold molecules"
AP Physics textbook works fine or a College Physics book.
This link gives you information on Optical Absorption
https://www.google.com/url?sa=t&rct=j&q ... ETxEZhI4Dw

This link is for clay minerals
http://www.clays.org/journal/archive/vo ... 1-1-59.pdf
I sugest reading them, they are very informative.

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Re: Optics B/C

Postby chalker » Sat Oct 15, 2016 1:36 pm

deji725 wrote:I noticed that there was a kit for Optics. I'm kind of contemplating on whether I should buy it or not.Suggestions?


It's just the LSS setup. There are instructions I made on the Official website to build your own, but if you don't want to do that the Wards Sci one is pre-built and very nice.

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Re: Optics B/C

Postby kenniky » Sat Oct 15, 2016 8:53 pm

deji725 wrote:@kenniky
Im guessing you mean like for example "optical absorption spectra of a series of nanocrystal gold molecules"
AP Physics textbook works fine or a College Physics book.
This link gives you information on Optical Absorption
https://www.google.com/url?sa=t&rct=j&q ... ETxEZhI4Dw

This link is for clay minerals
http://www.clays.org/journal/archive/vo ... 1-1-59.pdf
I sugest reading them, they are very informative.

sick

although idk where the gold molecules came in lol
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Re: Optics B/C

Postby Inventer03 » Mon Oct 17, 2016 10:02 pm

I noticed that there is allowed to have premade pamphlets when you go to competition. What does this mean, is there different things if could be used for?

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Re: Optics B/C

Postby Unome » Mon Oct 17, 2016 10:59 pm

Inventer03 wrote:I noticed that there is allowed to have premade templates when you go to competition. What does this mean, is there different things if could be used for?

I suspect some teams place these on the LSS ad use them to align mirrors.
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Re: Optics B/C

Postby JonB » Tue Oct 18, 2016 2:00 pm

Unome wrote:
Inventer03 wrote:I noticed that there is allowed to have premade templates when you go to competition. What does this mean, is there different things if could be used for?

I suspect some teams place these on the LSS ad use them to align mirrors.



This is correct.

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Re: Optics B/C

Postby cougar101 » Thu Oct 20, 2016 2:34 pm

bernard wrote:Optics Wiki
Optics Test Exchange 2017
Past Threads: 2011, 2012

Would it be helpful to build your own optics setup before the optics b/c event?

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Re: Optics B/C

Postby JonB » Thu Oct 20, 2016 4:15 pm

cougar101 wrote:
bernard wrote:Optics Wiki
Optics Test Exchange 2017
Past Threads: 2011, 2012

Would it be helpful to build your own optics setup before the optics b/c event?



Very much so.

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Re: Optics B/C

Postby superpenguin666 » Fri Oct 28, 2016 11:45 pm

Hey,
does anyone know what films, chemicals, and dyes have to do with the optical absorption spectra (a handout would be great)? I know about absorbance and the absorption coefficient, but I don't know how they're relevant to latter.

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