Owen Barritt (hmmm_tea) wrote,
Owen Barritt

  • Mood:

Why Do Mirrors Flip Left And Right And Not Up And Down?

On the Today programme this morning they had a science Q&A. They did the Qs just before I left for work, so unfortunately I missed the As.

One of the Qs was something along the lines of "Why do mirrors flip left and right, and not up and down?". Having heard the question before, I do know the answer, but still find it fascinating whenever it comes up, as it's one of those questions where the answer is completely obvious and entirely non-obvious at the same time (one of those kick yourselves when you find out the answer for not spotting it yourself type things).

The answer is, obviously (just to rub it in for those who don't know the answer already and like me didn't spotted it for themselves), that mirrors in fact flip front and back and not left and right. When you look at your reflection, your reflected left is still on your left and your reflected right is still on your right. The idea of these being flipped comes from the fact that your reflection is facing the other way and left/right depend on the direction you are facing whereas up and down don't.

I find it fascinating that the vast majority of people (including myself) pick up the misconception that mirrors flip left and right. Why is this? Is it due to discussing other people's left and right and considering our reflections as a separate entity? Do young children who are only just learning about left and right have this misconception?
Tags: maths, psychology, questions, science

  • Funny the things you find gathering dust at the back of the internet

    Does this still work?  or do I need to write in cyrillic to post on here nowadays?

  • Apropos Nothing

    Did they do something to the comments form? I'm sure it didn't look like that this morning... Also, oh look, first post of the year. Happy New Year!…

  • 2011

    Judging by twitter it looked something like this: January 1/1 is beginning to wonder if there are any marching bands left in America or…

  • Post a new comment


    default userpic

    Your reply will be screened

    Your IP address will be recorded 

    When you submit the form an invisible reCAPTCHA check will be performed.
    You must follow the Privacy Policy and Google Terms of use.