Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Problem 23.11 Light reflection

  1. Mar 22, 2008 #1
    1. The problem statement, all variables and given/known data

    It is 171 cm from your eyes to your toes. You're standing 210 cm in front of a tall mirror.

    How far is it from your eyes to the image of your toes?

    2. Relevant equations


    3. The attempt at a solution

    The answer which I got from the back of the book is 433cm.

    I have the answer. Whoopie. But I have no idea how to do get the answer on my own. I know that light will hit the mirror and bounce off at an angle.
    The angle of incidence is the angle between the incoming light and the normal.
    The angle of reflection is the angle between the reflected ray of light and the normal.
    If some one could please explain to me how to go about this problem I would greatly appreciate it.
    Thanks :smile:
    Last edited: Mar 22, 2008
  2. jcsd
  3. Mar 22, 2008 #2
    your toes are 210 cm in front of the mirror. The image of your toes is 210 cm behind the mirror. (draw a picture)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook