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    I'm getting a bit worried now, can someone explain how they got the angle?

    Was it not θ = (5cm / x ) ? (where x is measured in cm, of course)
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    The detector had diameter 10mm or 1 cm, so radius of 0.5cm. The distance at which the beam exactly covered the whole detector was about 90cm. So tan θ was 0.5/90 and θ is 0.3 degrees. Unless I'm wrong?
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    No, you must be right...

    Bother, I misread the diameter width as 10cm... Don't know what I was thinking

    I expect I was subconsciously expecting all the measurements to be in the same units, as that's what we're always told to do in class.
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    :eek: i'm thinking about taking a physics aea but a) don't know if my school will let me and b) it seems so complicated reading through what you've all written. However i do enjoy physics a lot. any advice would be much appreciated. thanks
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    (Original post by suneilr)
    :eek: i'm thinking about taking a physics aea but a) don't know if my school will let me and b) it seems so complicated reading through what you've all written. However i do enjoy physics a lot. any advice would be much appreciated. thanks
    Go for it

    You won't be asked on anything you haven't studied.

    Have a browse through the CCEA website, there's lots of information on there
 
 
 

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