The Week of September 21

This week we extended our researches on light. We learned that a flame is reflected upside down because theres only enough room for the top to go through the bottom part and the bottom to go through the top part of the hole in the cardboard. I also learned how a camera works. The flash of the camera hits the object and bounces back into the lense and it is saved into the hard drive or memory of the camera.
In the second part of the week we examined a laser pointer hitting a mirror and bouncing back onto the wall. We determined that either surfaces have different reflectiveness or that the laser pointer hits off the mirror in a straight direction onto the wall. Our experiments for these hypothesis' include shining the laser light on different objects to see how bright or how big the light is on the surface. That concludes last weeks science classes.

The Week of the September 14th

This Week in Mr. Finley's class i learned many new ideas about light. I learned these ideas by testing many experiments. One of the biggest experiments about light we had was the dark room experiment. My hypothesis was that in a dark room our eyes would adjust to having no light in 5 minutes. Our experiment was we went under Mr. Finleys desk in the complete darkness. After 5 minutes if you could see what the sign on the wall said your hypothesis would be right. My prediction was after 4 or 5 minutes i would be able to see the sign. When i did my experiment i could see nothing. My conclusion was that you cant see in the dark because when you see, the pupils expand in your eyes to bring in light and without light this cant happpen. It is important to know this idea so if you decide to go somewhere or do something at night you wont hurt yourself. We also learned about light rays,but we are not completely finished with that experiment.
Later in the week we also learned about laser pointers. We learned that a laser pointer flows in a straight beam until it hits a solid object. We are all able to see the dot because the dot hits onto the wall and bounces in many directions into our eyes. This concept is also the same with light rays. To end my post we learned that the laser pointer travels in a straight beam by clapping flour with chalk earsers by the beam showing the beams fullness. This works because flower particles are opaque enough for the beam to bounce off of into our eyes. THE END