I've created this thread for the Unit 2 exam, as there doesn't seem to be a thread on it. Feel free to discuss anything regarding this exam, such as how you are revising if you have already started.
I've created this thread for the Unit 2 exam, as there doesn't seem to be a thread on it. Feel free to discuss anything regarding this exam, such as how you are revising if you have already started.
I have done this paper last year Good luck to you all
Do you know if we need to know the frequencies/wavelengths for the EM spectrum?
Yes you do, last year a question came up albeit 1 mark but it came up, "What does this frequency belong too?" also the wavelengths are necessary as they usually ask questions on colour wavelengths such as blue and red.
Yes you do, last year a question came up albeit 1 mark but it came up, "What does this frequency belong too?" also the wavelengths are necessary as they usually ask questions on colour wavelengths such as blue and red.
Oh, I didn't know that thanks .When revising for GCSEs, I would go through the specification and use it as a checklist, but the Edexcel physics spec doesn't seem to be as specific (and vague in some areas), so do you know of any online checklist/resource I could use instead?
Oh, I didn't know that thanks .When revising for GCSEs, I would go through the specification and use it as a checklist, but the Edexcel physics spec doesn't seem to be as specific (and vague in some areas), so do you know of any online checklist/resource I could use instead?
I agree completely, but sadly I don't know anywhere to get a more in depth spec.
Can anyone explain stopping potential to me please?
Stopping potential is the potential difference that just stops all emitted electrons - it allows the maximum kinetic energy of the photoelectrons to be calculated.
show your working out in the form of a spoiler. best (or first answer for calculation questions) answer gets reppppp.
This is where using τ instead of π to measure radians would be better. Then you could very easily convert between phase and path difference by swapping τ and λ.
Stopping potential is the potential difference that just stops all emitted electrons - it allows the maximum kinetic energy of the photoelectrons to be calculated.
Thank you Are there any important experiments we should know about stopping potential?