12d homework

Exam question - answer in full for 6 marks

When monochromatic light is incident on a metal plate, electrons are emitted only when the frequency of light exceeds a certain frequency.
Explain in terms of energy, why this threshold frequency exists and why a photon theory of light provides a better explanation of the photoelectric effect than a wave theory of light.
The quality of your written answer will be assessed in this question.

Upcoming FREE events at Oxford Physics

Free lectures and events at Oxford University Department of Physics - links below 

NEW Tickets available for our alumni talk, ‘Space Lab’. More information is presented below and in the attached poster. Please contact the Alumni Office directly to book places.

Space Lab: Inspiring the next generation of scientists

Thursday 28^th November 2013, 4pm-5.30pm

Oxford Physics alumni and Google employee talks about his life and inspiring idea to run a global competition called YouTube Space Lab where school students designed an experiment that was sent into space. More information and booking: http://www2.physics.ox.ac.uk/events/2013/11/28/space-lab-inspiring-the-next-generation-of-scientists.

NEW, next month our second instalment of Flash Talk Physics:

Flash Talk Physics

Wednesday 4^th December 2013, 6.30pm-8.30pm.

Our research students present their work, look out for interesting props and demonstrations and vote for your favourite talks: http://www2.physics.ox.ac.uk/events/2013/12/04/flash-talk-physics. 

Physics A-level Club Tuesdays in W8

Physics drop-in
At least one Physics teacher will be available every Tuesday after school from 3.00- 4.00pm to help with your Physics needs.  Bring some work to do, e.g. questions, homework you are stuck with, or come with things to ask about.
We will be operating a loyalty card system with an end of year reward for the person with the most points!
Thanks and hope to see you there
Ms H