Optics B/C

Locked
User avatar
smartkid222
Exalted Member
Exalted Member
Posts: 774
Joined: June 22nd, 2008, 8:12 am
Division: C
State: NY
Location: Western Long Island

Re: Optics B/C

Post by smartkid222 » April 6th, 2011, 4:27 pm

Yes

Also, everything must be holepunched.
Image 2008 NY BLG Champ
2010 NY Helicopter Champ

Zest
Member
Member
Posts: 22
Joined: April 3rd, 2011, 1:33 pm
Division: B
State: NY

Re: Optics B/C

Post by Zest » April 6th, 2011, 4:47 pm

what if we have post-it tabs?

Zest
Member
Member
Posts: 22
Joined: April 3rd, 2011, 1:33 pm
Division: B
State: NY

Re: Optics B/C

Post by Zest » April 6th, 2011, 4:52 pm

chalker wrote:
Zest wrote:does anyone have the answer key for the texas 2011 regionals test (from the test exchange)?
I do (since I wrote the test;), but I have a general policy of not providing answer keys to my tests. I think the learning experience is better if you have to work through the questions and feel confident in the answers, rather then just skimming them over. That said, I will answer questions about specific items on the test if there are ambiguities or confusion about them.
ok then, for question 9, would the correct answer be 4.8 X 10^6 meter/sec? I'm not quite sure if I solved it correctly.

User avatar
zyzzyva980
Admin Emeritus
Admin Emeritus
Posts: 1539
Joined: November 18th, 2009, 12:59 pm
Division: Grad
State: IA
Location: Des Moines
Contact:

Re: Optics B/C

Post by zyzzyva980 » April 6th, 2011, 6:26 pm

I would be on the safe side and go with binder dividers. They're cheap and less likely to fall out.
Olathe North HS, 2011-2013 | National Runner-Up, Sounds of Music (2012)
Never lose the joy of competing in the pursuit of winning

Resources
Site Help: FAQ & IRC
Event Help: [wiki][/wiki] & Image Gallery
Social Networks: scioly.org on Facebook & Twitter

User avatar
tuftedtitmouse12
Member
Member
Posts: 778
Joined: January 3rd, 2011, 12:26 pm
Division: Grad

Re: Optics B/C

Post by tuftedtitmouse12 » April 7th, 2011, 1:22 pm

got that! :lol: :lol: :D wasted a few dollars, but i HOPE IT'S WORTH IT....my allowance is dissappearing faster than i can gain.... sci oly does take a lot of money...buying field guides, supplies, lasers, boxes, paper,.... but i hope it's worth it....
peter, peter, peter

User avatar
multivariable
Member
Member
Posts: 2
Joined: April 7th, 2011, 7:59 pm
Division: B
State: KY

Re: Optics B/C

Post by multivariable » April 9th, 2011, 4:08 pm

@Dr. Chalker

For your test (on Text Exchange), on Part 2: Physical Optics question 9, does it deal with the Doppler Shift? If so, does that mean the star is moving away from Earth? Also, how can you calculate the speed at which it is moving away?
Division B 2011 Events Results:
Optics: 1st (Regionals); TBA (State) 4/30/11
Compute This: 1st (Regionals); TBA (State) 4/30/11
Dynamic Planet: 3rd (Regionals); TBA (State) 4/30/11

chalker
Member
Member
Posts: 2095
Joined: January 9th, 2009, 7:30 pm
Division: Grad
State: OH

Re: Optics B/C

Post by chalker » April 9th, 2011, 6:57 pm

multivariable wrote:@Dr. Chalker

For your test (on Text Exchange), on Part 2: Physical Optics question 9, does it deal with the Doppler Shift? If so, does that mean the star is moving away from Earth? Also, how can you calculate the speed at which it is moving away?
Yes it's doppler shift. Check out the wikipedia page (http://en.wikipedia.org/wiki/Doppler_effect) for more details.

Student Alumni
National Event Supervisor
National Physical Sciences Rules Committee Chair

Rocketeer
Member
Member
Posts: 6
Joined: March 27th, 2011, 2:10 pm
Division: B

Re: Optics B/C

Post by Rocketeer » April 10th, 2011, 7:19 am

Today I am making the laser practice field with a inexpensive ebay laser and a mirror. Any advice on practice and also on how to cram for the optics test in one week???

hscmom
Coach
Coach
Posts: 242
Joined: March 3rd, 2010, 8:41 pm
Division: Grad
State: CO
Location: Colorado

Re: Optics B/C

Post by hscmom » April 10th, 2011, 12:47 pm

Zest wrote: So... does anyone know? Does this mean that we can bring things that are not listed and are not directly forbidden?
Not in Colorado -- no templates. :o
Homeschool Science Colorado since August 2008

User avatar
googlyfrog
Member
Member
Posts: 161
Joined: August 13th, 2009, 8:55 am
Division: C
State: PA
Location: Strath Haven Middle School

Re: Optics B/C

Post by googlyfrog » April 13th, 2011, 6:19 pm

I was given this question: "What is the energy of an infrared wave with a wavelength of 12.5 micrometers?"
I used E = hc/wavelength, and got 1.58 x 10^-20. The answer sheet has this number, but in addition it subtracts 2 x 10^-20 from it. Does anyone know why? Used h = 6.626 x 10^-34, and c = 2.99 x 10^8.

Locked

Return to “2011 Lab Events”

Who is online

Users browsing this forum: No registered users and 2 guests