Refraction and Snell’s Law – A Level Physics

Published on January 28, 2015 by

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  • Bethany Parkins 8 years ago

    Just want to say thankyou for putting your time and effort into these videos, I’ve just come across them and they’ve already made many things much clearer for me! So thankyou

  • Arthur Collier 7 years ago

    Hi there, do you have any videos explaining the critical angle? Thanks, good work on your videos by the way, there are many A level physics videos but I rarely come across any that aren’t boring so thanks 🙂

    • Physics Online 7 years ago
    • Arthur Collier 7 years ago

      Thank you 

  • Mary Lopez 7 years ago

    I love your methods of explaining the concepts! They’re fab, as well as actually explaining them thoroughly! Thank you 😀

  • Naqeeb Tahasildar 7 years ago

    your amazing

  • OMG 7 years ago

    You’re AMAZING! Thank you…for LIFE 🙂

  • Knowledge Scroll 7 years ago

    I find your videos very concise and well explained. Please keep up the good work !!!

  • Alfan Alarabi 6 years ago

    This is the most useful thing ever.

    • Physics Online 6 years ago

      +Alfan Alarabi Thanks!

  • Ashar Shah 6 years ago

    Thankyou so much.I have a phy exam on monday.Useful!!

  • Nicole Fok 5 years ago

    Thank you so much for the content! Would it be possible to make some videos on ray diagrams and lens, including the use of the equations?

  • Ronaldo T Blake 5 years ago

    You are a brilliant teacher. That initial illustration of refraction is great. I hope you can lead me to victory on Monday.

  • cris rose 4 years ago

    quality ray box? you mean they aren’t all just toilet roll rubes with a filament bulb taped to one end?

  • Bishop Baptu 4 years ago

    3:34 Isn’t snells law –> sin(i)/sin(r) = n(r)/n(i) and not = n?

    • TinkerTavern 4 years ago

      Bishop Baptu I think you’re right, but it’s typically used from air- something else, where the n of air is basically 1

  • Susanna M 4 years ago

    is there an explanation anywhere for why and how these things happen?

  • Angelo 3 years ago

    why does it bend toward the normal

  • Egor Silovs 3 years ago

    I’m using your videos for GCSE revision. They actually go into enough detail for me to understand the whole concept, unlike most of the GCSE books and channels.

  • Muhammad Mirsab 3 years ago

    Woah that analogy of refraction in the beginning! Genius!

  • Muhammad Sajjad 2 years ago

    wait snell lived about 500 years ago how did he calculate speed of light

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