Period 1

Today in class we light up a candle and put it next to the wall, we drew a ray diagram of where the light was going to go. We drew the rays of where the rays from the candle were going. We wrote on the board that the light went from the candle and went everywhere and it bounced off the wall and towards us. This happend because there was light shining off the wall from the candle that we could see.

Next we had the light and a piece of cardboard, there was a hole in the piece of cardboard. When the candle was shining there was a dot on the wall from the candle through the cardboard. The dot was the image of the candle uside down. We drew up how this happend with the rays from the light. Every table in the class had a different idea of how the candle was upside down when it went through the little hole through the cardboard. We said that the light from the bottom went through the hole and went to the top of the shadow on the wall.

Absorbing Lasers and Experiment Assumptions -Period 1

Today, we pointed lasers at different materials to for different in the way it reflects and if there is a difference, then why. We found out that the walls and floors "cling more too light, and meetal and laminated paper, reflected it more. We then also figured out that the color of the laser piont colored different when it was on a black background and on a white background. We then decided thatthe black absorbed the light. Then we still had to figure out what happened when the laser got pointed on the wall. We decided to come back on that later.

Then Mr. Finley told us that our experiment on Friday had gave data that he had never seen before. We then tried to figure out his assumption that he made.

We made three guesses:

• The size of the light bulb
• We all had the lights on at the same time
• The type of the light bulb

The type of the light bulb did affect the experiment. When we did the experiment again with a normal light bulb the light did spread out everywhere, and ther was no circle on the ceiling. When we used the flood light there was a circle on the ceiling. This makes sense because a flood light is made to send all the light out in one direction.

We then went over the homework. We started by drawing our idea. Ryan went up and drew his idea. His drawing showed the light bulb with a few rays coming out. We then a

sked ourselves what was wrong with Ryan's drawing, if there was anything wrong. We decided that, yes, there was something wrong . There should be an infinite amount of rays coming out of one spot on the light bulb, and an infinite amount of rays coming out of the ligh

t bulb.Then Mr Finley, and the class changed it to the light bulb having an infinite amounts of rays coming out it, and an infinite amount of rays coming out every spot on the light bulb.

We then reminded ourselves

what we did on Friday, which was we tried to find out how many rays came out of one spot on the light bulb. Mr. Finley

also pointed out that if we drew curved lines on our quiz in the near future we would lose points, because we have tested this and know that they are straight. Then we asked ourselves what is happening when we move the cardboard closer to the wa

ll. We decided it became more concentrated. Why is it

more concentrated? Because there is less space for it .

We also got our quizzes back today. We were told that we have to work on our scientific writing a bit more. There are different kinds of letters on your quiz, next to your answers. These correspond with the rubric you can find online under the tab Course Information on Mr Finley's teacher webpage.

DB

Period 1 - Light Blog

What we did in class today is that we tested if we could see light before it hit its final destination. We did this by taking two chalkboard erasers and covering then with flower and hitting them togheter and then shining the light to see if it would go in a straiht line. This was the testing experiment we did. The hypothesis were that nothing would happen, light would reflect off partiles and show through the laser beams, and then only afflicted parts would show on laser and not be straight. After testing the experiment we found that the flower particles visible to light before it hit the wall and proved the second hypothesis right. By finding out this answer i conclude that light can be seen before the wall and that it does indeed travel in a staright line. But i also think if the light was less concentrated it would not go in a straight line and would bounce all over the place.

CV