You have probably noticed that when you look in the mirror, words get reversed, and your right hand looks like someone’s left hand.
Now try this. Hold 2 mirrors next to each other at an angle. Look at yourself near the intersection of the mirrors. Your right hand now looks like your right hand.
Elijah is holding up his right hand, and now it looks like his reflection is also holding up his right hand. Also if you had words on your shirt, they would look normal. Try wiggling your thumb. It is very strange to see your reflection wiggle its thumb on the other side.
Why does this happen?
Normally when you look into a mirror, light travels from your hand to the mirror and bounces back. This means there is one reflection.
When you set up the second mirror, the light goes from your hand to the first mirror, then to the second mirror, and finally back to you. This means it was reflected twice. So your right hand turned into a left hand on the first reflection. Then that image of a left hand was reflected to look like a right hand in the second mirror.
Check out the rest of our properties of light series here.