Speed of Light Using Purchase Receipts

There are lots of videos showing how to use a microwave oven and some substance that melts, like chocolate to measure the speed of light. My variation isn't edible, but it is cheap, makes use of hings that would otherwise go in the trash and it is accurate.

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Be the First to Share

    Recommendations

    • Book Character Costume Challenge

      Book Character Costume Challenge
    • Made with Math Contest

      Made with Math Contest
    • Multi-Discipline Contest

      Multi-Discipline Contest

    2 Discussions

    None
    barkergk

    6 years ago on Introduction

    To avoid confusion about light vs. microwaves, I should have added that the only difference between visible light and invisible microwaves is wavelenght. All electromagnetic radiation travels at the same speed under the same conditions.

    Also, the frequency of your microwave oven may be on a sticker on the back or bottom of the unit instead of inside.
    barkergk

    None
    foobear

    6 years ago on Introduction

    Thank you for sharing your genius! Wow, that was fascinating! And inventive!