## Optics B/C

Unome
Moderator
Posts: 3283
Joined: Sun Jan 26, 2014 8:48 pm
State: GA
Location: somewhere in the sciolyverse
Contact:

### Re: Optics B/C

How similar is this year's LSS to the 2012 version? (is this still applicable?)
Userpage
Chattahoochee High School

2018 Events: Anatomy and Physiology, Astronomy, Disease Detectives, Fermi Questions, Herpetology, Materials Science, Remote Sensing

chalker
Member
Posts: 2044
Joined: Sat Jan 10, 2009 3:30 am
State: OH
Contact:

### Re: Optics B/C

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.

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

sciencekid7
Member
Posts: 9
Joined: Wed Oct 12, 2016 4:56 am
State: -
Contact:

### Re: Optics B/C

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?

SPP SciO
Member
Posts: 243
Joined: Tue Mar 24, 2015 3:21 pm
Division: B
State: NY
Location: Brooklyn
Contact:

### Re: Optics B/C

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.
Coach
MS 821 Sunset Park Prep
http://www.sppscio.com

kenniky
Member
Posts: 282
Joined: Fri Jan 22, 2016 2:16 am
State: MA
Location: ABRHS --> UMichigan
Contact:

### Re: Optics B/C

Does anyone have a good source for studying optical absorption spectra?
Automated Event Assigner!
Tests Written
Results

deji725
Member
Posts: 12
Joined: Wed Nov 04, 2015 10:26 pm
Division: C
State: -
Contact:

### Re: Optics B/C

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

deji725
Member
Posts: 12
Joined: Wed Nov 04, 2015 10:26 pm
Division: C
State: -
Contact:

### Re: Optics B/C

@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

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.

chalker
Member
Posts: 2044
Joined: Sat Jan 10, 2009 3:30 am
State: OH
Contact:

### Re: Optics B/C

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.

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

kenniky
Member
Posts: 282
Joined: Fri Jan 22, 2016 2:16 am
State: MA
Location: ABRHS --> UMichigan
Contact:

### Re: Optics B/C

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

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
Automated Event Assigner!
Tests Written
Results

Inventer03
Member
Posts: 1
Joined: Mon Oct 17, 2016 9:56 pm
State: -
Contact:

### Re: Optics B/C

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?

Unome
Moderator
Posts: 3283
Joined: Sun Jan 26, 2014 8:48 pm
State: GA
Location: somewhere in the sciolyverse
Contact:

### Re: Optics B/C

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.
Userpage
Chattahoochee High School

2018 Events: Anatomy and Physiology, Astronomy, Disease Detectives, Fermi Questions, Herpetology, Materials Science, Remote Sensing

JonB
Coach
Posts: 261
Joined: Tue Mar 11, 2014 7:00 pm
Division: C
State: FL
Contact:

### Re: Optics B/C

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.

cougar101
Member
Posts: 1
Joined: Tue Oct 18, 2016 2:36 am
State: -
Contact:

### Re: Optics B/C

bernard wrote:Optics Wiki
Optics Test Exchange 2017

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

JonB
Coach
Posts: 261
Joined: Tue Mar 11, 2014 7:00 pm
Division: C
State: FL
Contact:

### Re: Optics B/C

cougar101 wrote:
bernard wrote:Optics Wiki
Optics Test Exchange 2017

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

Very much so.

superpenguin666
Member
Posts: 17
Joined: Tue May 24, 2016 11:56 pm
Division: C
State: MO
Location: Antarctica
Contact:

### Re: Optics B/C

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.

Thanks,
Superpenguin666
2017-2018 Season: Thermo , Ecology, Optics
Goals: Win nats in Optics and Thermo... wait a minute...
State: Not scored/1/1