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    Calculate the kinetic energy, speed and momentum of an electron as it passes through the hole in the anode.
    mass of an electron = 9.1 × 10–31 kg
    charge of an electron = –1.6 × 10–19 C





    The mark scheme just uses is simple equations but how do you get the velocity for the electron?
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    Are you sure a speed is not given , or does it travel at the speed of light?
    Kinetic energy=0.5MV^2
    E=HF=HC/Y
    E=MC^2
    E=MGH
    finding energy would be the first thing to do or to find wavelength but it seems like your not given enough to use any of these
    even the debroglie wavelength wont help you unless you know Wavelength or velocity.
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    (Original post by cero70)
    Are you sure a speed is not given , or does it travel at the speed of light?
    Kinetic energy=0.5MV^2
    E=HF=HC/Y
    E=MC^2
    E=MGH
    finding energy would be the first thing to do or to find wavelength but it seems like your not given enough to use any of these
    even the debroglie wavelength wont help you unless you know Wavelength or velocity.
    thats it, its also the first part of the question so its not like you can use any previous answers
    but thankyou for trying!
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    Is there any other information given (maybe P.D across the region)?
 
 
 

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