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    (Original post by BCHL85)
    and what emits light of wavelength 10^-6m ??
    wasnt it just a source of IR...i said a radiator
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    (Original post by BCHL85)
    I checked, 100m is short-radiowave, I put radiowaves UHF as well
    10^-6m I think is IR (microwave is about 1cm ??)
    yeh! thats what i put! what did you put as source

    originally i put stars, then i changed it to "old fashioned electric heater - one with a heating element"

    anyone think i'll get anything for that, lol - couldn't and still can't think of anything else
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    (Original post by mackin boi)
    wasnt it just a source of IR...i said a radiator
    had to say electirc i think - because teh gas ones in UK homes dont emit IR
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    I just put hot body
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    (Original post by BCHL85)
    I just put hot body
    wasn't that what they put under visable light? - by the way - what wavelength did you guys put for visable? i put 5x10^-7 - is that in the range?
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    (Original post by Phil23)
    wasn't that what they put under visable light? - by the way - what wavelength did you guys put for visable? i put 5x10^-7 - is that in the range?
    Yes it is ... but I put the range from 4*10^-7 -> 7.6*10^-7
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    (Original post by Phil23)
    and the second bit i found weird was teh spider weeb thingy - i got 16.3 Hz or something ike that
    I got 8.17Hz. Cos I put:

    wavelength = 2 x distance between 2 nodes
    = 2 x 2.4 x 0.25
    = 1.2

    then f=v/lambda
    =9.8/1.2
    =8.17Hz
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    (Original post by Phil23)
    wasn't that what they put under visable light? - by the way - what wavelength did you guys put for visable? i put 5x10^-7 - is that in the range?
    Yes it is ... but I put the range from 4*10^-7 -> 7.6*10^-7
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    I Put 1*10^-8

    Tha Range Is > 700*10^-7
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    its getin 2 much for me...i think im not readin nemore
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    (Original post by mackin boi)
    I Put 1*10^-8

    Tha Range Is > 700*10^-7
    The question after that did show you the range of visible light
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    (Original post by sonja)
    I got 8.17Hz. Cos I put:

    wavelength = 2 x distance between 2 nodes
    = 2 x 2.4 x 0.25
    = 1.2

    then f=v/lambda
    =9.8/1.2
    =8.17Hz
    Same here
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    (Original post by BCHL85)
    and what emits light of wavelength 10^-6m ??
    Infrared => i said a TV remote control.
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    (Original post by Economist)
    Same here
    looks like i lost a few marks on that then
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    (Original post by Economist)
    Same here
    Yay! (well at least if it's wrong, I'm not alone!)
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    (Original post by nas7232)
    Infrared => i said a TV remote control.
    Same here
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    (Original post by sonja)
    Yay! (well at least if it's wrong, I'm not alone!)
    lol - few peopel got my answer, and a few got yours - hit and miss which one is right really, unless some uni physicist comes in and tells us the facts :cool:
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    i disagree

    i measured the half wavelength = x cm

    Therefore 1 wavelength = 2x = something

    map this => 0.25cm x something = lambda

    f = c/lambda = answer [which was same as phils]

    i hope it's right
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    Wavelength = 2 x node to node = 2 x 2.4 = 4.8
    4.8 x 0.25 = 1.2
    9.2 /1.2 = 8.17Hz
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    Oh .... where the hell is that 0.25?
 
 
 
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