Turn on thread page Beta

AS Physics : Photoelectric effect question involving a graph.. watch

    • Thread Starter
    Offline

    7
    ReputationRep:
    "By rearranging the photoelectric equation, show that the graph of Ek (y - axis) plotted against  1/\lambda   (x-axis) will give a straight line.

    Any help/suggestions appreciated
    Offline

    14
    ReputationRep:
    E = hf = \frac{hc}{\lambda}

    You know the equation of a straight line is

    y = mx + c

    so just compare the two.

    E -> y, \frac{1}{\lambda} -> x and hc ->m



    I believe. Attribute silly errors to me being tired :p:

    In fact you can show that as E is inversely proportional to \lambda, as E goes to zero, \lambda goes to infinity, which is physically true. Longer wavelengths have less energy than shorter ones.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 11, 2008
Poll
Cats or dogs?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.