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Investigations - HSN forum

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Investigations


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#1 Dave

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Posted 06 February 2005 - 11:37 AM

how is everyones investigations going mine is a bit of a mess the experiments aren't working as they should and i have lost interest in fighting them to get results

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#2 $impl_ih

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Posted 06 February 2005 - 11:47 AM

Hey i just made a seperate topic so we can discuss our investigations here.

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#3 Dave

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Posted 06 February 2005 - 11:49 AM

tongue.gif i noticed

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#4 $impl_ih

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Posted 06 February 2005 - 11:52 AM

My investigation has three parts to it, and i have completed the first part and have done my graphs and stuff for it.
So when i go back i will try and finish the rest of it biggrin.gif
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#5 Dave

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Posted 06 February 2005 - 11:55 AM

Mine is to find 3 methods of finding the focal length of a convex lens and three methods of finding the focal length of a concave lens.

I have done the convex stuff and tried three for the concave method but they aren't really working

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#6 werlop

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Posted 06 February 2005 - 12:58 PM

I havn't started mine yet.
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#7 clueless

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Posted 06 February 2005 - 01:29 PM

All i am doing is looking at how the resistance of an LDR changes with light levels. I don't think its advanced enough but i've already started my experiments. Anybody have any ideas as to how i could extend it to make it more at the 'advanced higher' level.

#8 Dave

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Posted 06 February 2005 - 01:33 PM

i dont know is a LDR affected my the idea of photons and energy of photons if so you could use different light sources to see the effect on the resistance-light relationship

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#9 Girl

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Posted 06 February 2005 - 05:49 PM

QUOTE(Dave @ Feb 6 2005, 12:55 PM)
Mine is to find 3 methods of finding the focal length of a convex lens and three methods of finding the focal length of a concave lens.

I have done the convex stuff and tried three for the concave method but they aren't really working

View Post



oh, my friend is doing that one as well. my investigation involves measuring the wavelength of light using 4 different methods. i think i'm starting it tomorrow. mhm....

#10 Dave

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Posted 06 February 2005 - 05:52 PM

it sounds easy but its seriously fiddley and there is some wierd methods

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#11 Girl

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Posted 06 February 2005 - 06:02 PM

oh, dont worry! am sure no adv. phys investigation can possibly be easy.

#12 Dave

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Posted 11 February 2005 - 06:03 PM

i need some advice here

I need to find the focal length of a concave lens, the methods i have found aren't really working. So, does anyone know of a quick and easy method

I reckon there must be a relationship between the thickness of lens, the diameter of lens and the material used that i can use to my advantage

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#13 werlop

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Posted 11 February 2005 - 06:32 PM

Have a look at http://scienceworld.wolfram.com/ there may be some material there, although I have not checked. The site has proven useful to me in the past.
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If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you
But make allowance for their doubting too,
If you can wait and not be tired by waiting,
Or being lied about, don't deal in lies,
Or being hated, don't give way to hating,
And yet don't look too good, nor talk too wise:
Yours is the Earth and everything that's in it,
And--which is more--you'll be a Man, my son!

#14 Dave

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Posted 11 February 2005 - 09:49 PM

sadly i couldn't see anything of use

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#15 $impl_ih

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Posted 11 February 2005 - 10:47 PM

QUOTE(werlop @ Feb 11 2005, 06:32 PM)
Have a look at http://scienceworld.wolfram.com/ there may be some material there, although I have not checked. The site has proven useful to me in the past.

View Post



Thanks will take a look biggrin.gif
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#16 broughy

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Posted 12 February 2005 - 12:22 AM


oh, my friend is doing that one as well. my investigation involves measuring the wavelength of light using 4 different methods. i think i'm starting it tomorrow. mhm....
[right]View Post[/right]
[/quote]



hows the wavelength of light experiement going? i did that one last year for my investigation (& coincidentally, am also doing it in the lab at uni at the minute - i forgot how fiddly it can be when i chose to do it this year!). what methods are you using to measure the wavelength of light? & what kind of source are you using? let me know if you need a hand with anything!
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#17 Girl

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Posted 12 February 2005 - 11:31 AM

erm..i'm using a spectrometer, young's double slit exp, a michelson inerferometer and the newton's ring things. so far i've only done the spectrometer - which is probably one of the simpler ones - and its going well-ish. my teacher warned me that the turning bit of the michelson is really hard to control/use unsure.gif but i'm probably most 'afraid' of the newton rings! i think there's maybe 2 lasers in the school and i've been using sodium, helium & cadmium lamps so far. oh, and thanks for your offer!

i was just wondering how close ur results were last year - the people who've done it in my school have mostly had nearly perfect (and sometimes perfect) results which is slightly weird. mine arent too far off but not perfect! oh, and what r u doing in ur uni experiments? i'm just curious to see all the things u can do with the wavelength of light. smile.gif





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