Our 1st stop is the . What you saw was your reflection in the mirror, which is the reflection of light. Light is bouncing off of you into the mirror, then into your eye in order for you to see yourself.
Curved mirrors have lots of uses.
The Genesis spacecraft uses a curved mirror to focus solar wind onto a target. Practice so that you can get your ball into the cup every time. Try to roll the rubber balls so that they bounce off the curve and go into the cup. Each person gets a turn rolling the balls so that everyone gets practice. You may want to fix the curve and experiment so that you can get the balls into the cup every time.