Monday, September 28, 2009

1. In class this week I learned that when you shine a certain shape of light through a small hole,due to the fact that it needs to flip its self to fit through it comes out on the wall upside down. I learned these ideas in class when we did the exeriment and shined the light bulb through.It is important to know this in the real world so that if you take a picture with a camera you know why it takes it upside down.

2. The camera works like the candle experiment by the fact that when the flash comes out of the small hole and flis upside down taking the picture upside down but hte camera prints it right side up. I learned this when we had a disscusion in class and came to this conclusion. It is important to know this because now just like in number 1 I will know why a camera takes a picture upside down and prits it right side up.

3. And last but not least I learned that certain surfaces have different levels of reflectivness such as water and wood. I learned this when we began an experiment where my group shined the lazer pointer on many surfaces in the room and gave their reflectiveness a rating of 1-5. It is important to know this because now I know why a mirror will be more reflective than a wall.

Sunday, September 20, 2009

Science Ideas I Learned In School This Week

Science Ideas
1. I learned that without light we wouldn't be able to see. I learned this by going through the experiment we did in class, which was getting into the pitch black cubbys underneath the desk and trying to read the sign even after I gave my eyes some time to adjust I still could read it. It is important to know this in the real world because now we know its a waste of time to try to read in the dark also I now that when it is itch black my eyes will not adjust to it.
2. I also learned that when light is shot out from a lazer pointer in gos out and hits the wall in one straight beam. I learned this when we did the experiment in class. And even though we couldn't see the beam of light because the beam wasnt reflecting off anything that was visible when we shot the beam through chalk dust we could see the beam going in a straight line. It is important to know this in the real world because now I know that rays of light travels in strait beams not spread out everywhere.
3. Another thing I learned is that the reason we see is that when light rays hit the object they bounce off every where and hit our eyes and thats how we see things. I learned this when we did an experiment in class where my group held a pencil inbetween a light bulb and a note book. And when we turned the light bulb on the rays shot out every where and bounced off the pencil and that blocked some of the light from hitting a part of the note book which was dark because it wasnt getting any light and that was the pencils shadow. It is important to know this in the real world because now we know why our shadows are dark because they they dont get light which makes them hard to see. And thats why they are dark.