HELP! photoelectric effect

[chantelle.salisbury]

hello,
i am really struggling to grasp all the concepts in the photoelectric effect (i know this may be a lil broad but it feels like its true ) would be seriouslyyy glad of any help
-what are the most important/ key ideas?
- how do i know whether to use  6.63 x 10 -34 Js or 4.14 x 10-15 eVs for Plancks constant?
-is rontgen's experiment important to know?!
- Lenard's experiment was to investigate the effect. he found out stuff like the maximum photocurrent is proportional to intensity. however, how do i find the maximum photocurrent? similarly, the stopping voltage is independent of light intensity, but am i expected to find values for the stopping voltage? if so, formulas?

and lastly, formulas? what are the no-brain, simple and basic formulas of this topic? and any other tips

thankyou sooo sooo much!!!!! very much appreciated

[heids]

wow!!!!! thanks everyone for the amazing support of not one reply!!!!! congratssss!!!
my patience has now waned

Please do remember that we're all volunteering our time here, and with so many questions and threads on ATARNotes there's no guarantee you'll get an answer, though we try our best.

[vox nihili]

wow!!!!! thanks everyone for the amazing support of not one reply!!!!! congratssss!!!
my patience has now waned

You asked five questions at once? It's not as though it's exactly a two minute job to answer them all. The people answering your questions are not getting paid to do so. Many of them are students like you.

Perhaps in the future try not to be such an entitled prat.

[Syndicate]

hello,
i am really struggling to grasp all the concepts in the photoelectric effect (i know this may be a lil broad but it feels like its true ) would be seriouslyyy glad of any help
-what are the most important/ key ideas?
- how do i know whether to use  6.63 x 10 -34 Js or 4.14 x 10-15 eVs for Plancks constant?
-is rontgen's experiment important to know?!
- Lenard's experiment was to investigate the effect. he found out stuff like the maximum photocurrent is proportional to intensity. however, how do i find the maximum photocurrent? similarly, the stopping voltage is independent of light intensity, but am i expected to find values for the stopping voltage? if so, formulas?

and lastly, formulas? what are the no-brain, simple and basic formulas of this topic? and any other tips

thankyou sooo sooo much!!!!! very much appreciated

Note: I haven't really done this topic in my class yet, but do know a fair bit about it.

1. I would suggest checking the study design. I think its the best resource you can find to do well in any of your subjects.

2. Use 6.63 x 10^-34 Js for the Planks constant. The eV form is basically another form of the Js form (1 eV = 1.60 x 10^-19). You can be expected to use both.

3. I am pretty sure you don't need to. But you would be better off confirming with your teacher.

4. I don't think you actually have to work it out. Maybe just list the qualitative affects on increasing frequency or intensity. Once again, it's best to talk to your teacher about it.

helpful formulas:
energy of photons = E = hf = hc/w (w is wavelength, h is Plank's constant, f is the frequency, and c is the speed of light constant)

Ekinetic= hf - work

Power = n x E/t (n is the number of photons, E is the energy of photons (formula above), and t is time in seconds).

minimum frequency = f0= Work/h

maximum wavelength= c/f0 (note f0 is the minimum frequency)

Tbh you don't really need to do as many maths calculations compared to topics from unit 3 (ie. motion). So it would be best if you focus on the theory, rather  than the maths itself in this topic (because you already given a reference sheet). Once you have a solid understanding of the concepts, it will be easier for yourself to create your own methods of remembering the formulas.

[chantelle.salisbury]

You asked five questions at once? It's not as though it's exactly a two minute job to answer them all. The people answering your questions are not getting paid to do so. Many of them are students like you.

Perhaps in the future try not to be such an entitled prat.

sorryyy!!!! i didnt mean to be such a dimwit!
i was just stressed and  just wanted to create a conversation that would help me with this topic... also please note... that the second post was posted 2 days after the first...not 2mins!
sorry again.. and i do respect and value all the students that help out here and trying to become one of those myself... sharing helpful tips/ ideas and teaching is one of the best ways to learn and grasp concepts. thankyou everyone who helps out

[chantelle.salisbury]

Note: I haven't really done this topic in my class yet, but do know a fair bit about it.

1. I would suggest checking the study design. I think its the best resource you can find to do well in any of your subjects.

2. Use 6.63 x 10^-34 Js for the Planks constant. The eV form is basically another form of the Js form (1 eV = 1.60 x 10^-19). You can be expected to use both.

3. I am pretty sure you don't need to. But you would be better off confirming with your teacher.

4. I don't think you actually have to work it out. Maybe just list the qualitative affects on increasing frequency or intensity. Once again, it's best to talk to your teacher about it.

helpful formulas:
energy of photons = E = hf = hc/w (w is wavelength, h is Plank's constant, f is the frequency, and c is the speed of light constant)

Ekinetic= hf - work

Power = n x E/t (n is the number of photons, E is the energy of photons (formula above), and t is time in seconds).

minimum frequency = f0= Work/h

maximum wavelength= c/f0 (note f0 is the minimum frequency)

Tbh you don't really need to do as many maths calculations compared to topics from unit 3 (ie. motion). So it would be best if you focus on the theory, rather  than the maths itself in this topic (because you already given a reference sheet). Once you have a solid understanding of the concepts, it will be easier for yourself to create your own methods of remembering the formulas.

thankyou so very much Syndicate. thats great...
i do actually do my physics via distance ed and mostly 'teach' myself all these concepts with minimal teacher support...
very very grateful for this support...

[Syndicate]

thankyou so very much Syndicate. thats great...
i do actually do my physics via distance ed and mostly 'teach' myself all these concepts with minimal teacher support...
very very grateful for this support...

I would suggest looking at Youtube videos in that case. Alexhua and Ben Ryder are really helpful. Although some of their content might be a bit too old, it's still better than having nothing (The physics study design should help you in determining whether one of their videos is helpful or not).

If you need any physics resources (ie. reference sheets, personal notes etc..), just shoot me a pm with your email.

Good Luck