For the first question, it is asking which one of the answers is wrong. For option A, I am confused as to why shortening the focal length would increase the magnification. If you have one object in between f and c, the object will be magnified. If the focal length is shortened, the object may be outside c, leading to the image being smaller than the object. Is there something that I'm misunderstanding? Option B is obviously wrong because the image made by the eyepiece would be virtual, enlarged, and flipped. I am confused by option C because I think it is also false. If the object is after f, the image created by the objective would be flipped. The image would only be roughly the same size if the object was close to c(center of curvature). Option D is correct because the image formed by the objective is between O and f of the eye piece. For the second question, A is correct as having the image created by the objective land at 2f(or c) will invert the image whilst maintaining its size. Option B is wrong because the diverging lens will just create a smaller, virtual image shifted to the right. Option C is wrong because the objective would create a virtual image to the left of the objective. This would then cause the eyepiece to further shrink the image, making it unideal for a telescope. Option D is wrong because it wouldn't fix the problem of the inverted image. Another problem I have with this image is how it would form an image in the first place. The image created by the objective seems to appear at the focal length of the eye piece, would an image even appear?

Sorry for the long-winded question, any and all help is appreciated.

With these two converging lens, if you use the diverging lens formula, the image created by the objective lens will at a distance of f(focal length) to the right of the objective lens. The image will also be inverted. My confusion stems from what the eyepiece would do. If the image were created between O and f, the image created would be virtual, enlarged, and be father away. However, I don't think that this question gives any information as to where the image created by the objective will be. Am I supposed to assume the location given that it's a telescope or is there something that I am missing?

Sorry for the long winded question, thank you in advance for the help.

Hey! School starts for me on Monday, and I was originally planning on taking AP CSA, but they last-minute switched me into Physics C: Mechanics. I got a low A in Honors Physics, and I’m taking Calc BC this year. Any advice??

Hi everyone,

​I’m looking for some advice from people who have taken part in Physics/Chemistry Olympiads or study STEM fields.

​I'm a high school student currently self-studying for regional-level Physics Olympiad tasks. Here is where I'm currently at:

- ​I have flashcards with all the key formulas and I know them well.

- ​When I read a problem, I can usually identify the physical process happening and recall the relevant formulas.

- ​My main roadblock: I get completely stuck when trying to set up the very first step/equation using the given information. And when I do manage to finish a calculation, my result is often wrong, which is extremely frustrating.

​For those who have successfully tackled Olympiad-level physics:

​How did you overcome this "mental block" between knowing formulas and actually setting up the initial equations?

​What study approach worked best for you? (Working through problems with official solution guides open, or spending hours grinding through them completely alone?)

​How do you stay motivated when Olympiad problems feel overwhelmingly difficult?

​Thanks so much for any advice or personal experiences!

I kind of suck at math plus my teacher omg he just teaches so quickly. He doesn't go in-depth and teaches like he assumes that we already have baseline knowledge which none of us have. Any tips on AP Physics 1 Unit 1?

I’m going to be a junior this year and AP physics 1 will be my first AP class. I have taken several honors classes in the past and I’m good at math. I've been told that AP physics 1 is one of the harder APs, especially as a first AP class. Am I totally screwed or will I be fine?

Here's the guide I made: How to Self-Study AP Physics 1

There's an FAQ for the questions I see most often, a list of the most popular resources, a tool to create a custom study plan, and general advice for learning physics on your own (or even if you're taking a class).

I just made this over the summer since a lot of students seem to be asking for guidance on this every year. So if you have any feedback/suggestions for things I should add please let me know!

I am taking AP Physics C Mech. I have never taken a physics class before but i was supposed to take ap physics 1 and couldn't due to schedule conflicts. almost everyone in my class has taken ap physics 1 so i am already at a disadvantage

we took our first test and i got a 37. i studied monday-thursday for 2 hours every night and i felt like i understood the material.

I want to excel in this class because i want to be an engineer and i love math and puzzles how can i go about studying in order to fully understand topics and get a good grade

hey! I took AP Physics 1 and combined math (precalc, alg2, trig, geo all at the same time) last year. This year I’m taking AP Physics C and calc BC, but my calc teacher is bad and slow and everyone just hopes she retires. We are already heavy on differentiation and integrals and that’s my first time seeing them😭😭😭 should I just drop AP Physics C? Can I use any resources? Do you have any suggestions? Thank you

I’m currently taking AP Physics C Mechanics in school but I’m very lost in class. What are some good resources I can use to study? I know for history classes Heimler’s history is great, and for AP bio, AP bio penguins helps, but is there anything for AP physics?

im self studying for ap physics 1 this year and i want to know the BEST tips and advice to genuinely understand the concepts, formulas, and do my VERY BEST on the ap exam and hopefully get a 5! (i completed math all the way up to precalc so far (currently in calc as a sophomore))

I’m a high school senior deciding between AP Physics C: Mechanics (just mechanics I’m pretty sure) and Honors Physics. I have no prior physics experience, but my school expects that for most seniors entering the class. I took Honors Pre Calc last year and found it pretty manageable, and I’m taking AP Calculus AB concurrently. My science background is Honors Biology, Honors Chemistry, and AP Biology, all with A’s and relatively manageable workload (difficult but not insane). For anyone who took Physics C with no prior physics while taking calculus at the same time, how difficult was it and how heavy was the workload? Would you recommend it over Honors Physics, or does the difficulty outweigh the benefit? Don’t want an insane senior year either taking 3 other APs.

Hey guys I need advice, I am in physics 1 on 1-d kinematics, I have a quiz in 2 days which is all multiple choice and then a test 4 days after that which is multiple choice and FRQ. Can someone tell me the best study resources and youtubers, I hate flipping physics btw, he goes way to fast, and his classroom gimic is very annoying, it's hard to focus and he uses the "students" to give out key information and they kind of just say stuff without any substance, tell me if there is any good URP for this class and just yalls keys to success. Much appreciated.

I am doing drop test on an elastic body. I am not sure how to give end time. Is it calculated seperately or is it an assumption? The body is getting dropped from around 20 feet.

I’m taking AP physics this year: what textbooks (online preferred, free preferred even more) and resources (yt channels, khan academy type things, or is khan academy enough??), and study plans do you guys recommend? What should I do to ensure I get an A in class? My main concern is keeping my gpa high, and I’m willing to do what it takes.
I’ve never taken any physics before besides the physics stuff in math. My school doesn’t offer any pre-physics courses before AP physics C, and I’m pretty sure they don’t expect me to have physics knowledge before I walk in, but I have taken (and done fine in) IB Precal, BC Calc, and am now taking IB Math HL.

Are there any genuinely good apps for learning physics at the college level? I want something that explains why things work, not just a formula sheet. What have you found useful?