september 28-october 2

This week we learned many important ideas about light. First we wanted to see how light travels when it bounces off of water. We found out that when it hits the water the rays bounce in all directions. It then bounces off of us back into the water so that we can see ourselves. Secondly we wanted to see what objects reflect light the best (high or low focus). One of my objects with high reflectiveness was a mirror, i gave it a 10 which means it can reflect the most focused light. The object that was very bad at reflecting light is a sweater, I gave it a 3. We also wanted to find the angles that the light bounced off the mirror. We tested this by shining a laser at a protractor and we saw the angle that it was at. We then saw that it came in at the same angle it came out. There were two angles that we wanted to find, the angle of incidence and the angle of reflection. These two angles were also known as angle A and angle B. We also learned what an assumption was: it is something that you guess about. If you want to be a good scientist you have to guess and then discover a test to see if your assumption was right. One assumption i made this week was that i thought that the angle lights hits and object is the angle it leaves. I also assumed that A+B=180 degrees. This will help us because we know how light bounces in our eyes.