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    Ive just been doing some past papers for 2moros exam....
    and came across this question where they give u a formula to work out the electron wavelengths...using

    Wavelength = 1.2 b Sin (theta)

    BUT

    I went and looked in the textbook, and the formula in there is

    Wavelength = d Sin (theta) / 1.2

    Wtf????

    Anyone got any ideas, or know if it was an error on the exam paper???

    Cheers
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    i think the first equation is the correct one
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    Don't worry, there are several different versions... My exam board always specifies which one to use, I'm sure yours does too.
 
 
 
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