Focal length of electrostatic lens
The kinematics of the 2nd part is getting too messy to solve and I'm getting an extra factor of e^(pi/2). What am I doing wrong?
13 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.Lol
Also, did you get it?
Yeah I just realized d<<R means sin approximation 🤦♂️
But lets keep the thread open till I get the final answer :sweaty:
Oh. 🤦♂️
In electric field component?
Could I see your working for the first one?
No, the second part. The note at the end of the paragraph tells you how to do the first part.
Idk why I didn't read that lol,
I didn't get it with the Gaussian surface too
The first one was something like this. Also, ig we had to consider E_radial doesn't depend on z (as z is a very small quantity in relation to given scales).
Oh I see.
Ok so focal distance huh
That is just kinematic monstrocity ig :sweaty:
Ye nvm. My method doesn't work lol. Any ideas?
That's what I got too
I was thinking if work energy theorem would work but idts
Yep.
+solved @Opt
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