Optics explained 2: Focus or Focal point

In this video you will find:

- Explanation what a focus or focal point is.
- Explanation how to determine the focus point with a converging lens.
- Explanation how to determine the focus point with a diverging lens.
- Two example questions.

The PhysicsPlace is an educational YouTube channel where high school and college physics is explained. Every video also has a few example questions which you can use to check your knowledge!

[xavierhsu]

i'm so happy i watched this video, it helped me so much with the basic knowledge beside skimming thru the textbook. absolutely loving it!

[annastrawberriez]

ugh BEST video. Really helped my understanding of what a focal point is thank you

[stephanielopez]

THIS WAS GREAT it gave me a good amount of background info that just made so much sense bc I had a lab about lenses in my physics class and I didn’t not know the basics until now

[transient-sight]

Dude keep going since years ago we come here from 9gag 🤝

[emiliuskaijage]

Happy to have been correct even before I saw the answers 😀😀

[SNROPQUEYR]

Thanks PhysicsPlace ~ You are helping a lot of students out there! 💪♥💪

[germanortega]

absolutely amazing content my brother in christ... please keep the videos coming

[erikfermin]

Awesome video really helped me clear up some things 🙏🏽🙏🏽🙏🏽

[djsupream]

what is the difference measured between the focal point normal light in a camera and infrared light ?

[doofus_robot]

0:25 Even all light that isn't originating normal to the optical center? any light from any angle isn't bent?

[no-delg]

This is so complicated i have no basic foundation knowledge of this i need to build my foundation from scratch but where can u help please sir 🥺

[danikahornick]

This explained how to find focal point better than any other video I tried watching. THANK YOU.