Jounal Entry 9/28 continued

The image gets disturbed because the light rays that should have been hitting our eyes are now hitting the water and scattering in all directions so that we don't see the picture on the water.

Jounal Entry 9/28

the first photo shows how the reflection of the landscape on the water. This is explained because the light ray goes from the sun, to the mountain and reflects back to our eyes. When the water is disturbed we cannot see the reflection because all the refracted rays get scattered.

The picture of the whale is explained because all of the rays are bent when they hit the water because light moves slower in water than air. The light and dark spots are caused by the ripples on the surface that send the rays to certain spot and not to other certain spots. The whale has many dark and light spots as a result.

Jounal Entry 9/21

"If you were to turn off the room lights for a moment and then cover all the windows with black construction paper to prevent any entry of light into the room, then you would notice that nothing in the room would be visible."

This quote is confusing because things are visible because our eyes adjust. Even right after there is no light some things are still visible. I know its wrong because we did that same thing and i could see some things right after we covered everything.
If you were to turn the lights off in a room and not let ANY light in then we wouldn't see much but some things are still visible. Our eyes adjust over time and then we can see much better.

"When a room full of objects (or a table, a shirt or a sky) looks black, then the objects are not generating nor reflecting light to your eyes. And without light, there would be no sight."

This quote is confusing because we can actually see those objects.
A room full of objects in a completely dark room, the objects can be visible because our eyes adjust.

Jounal Entry 9/16

This week we learned that in a completely dark room, our eyes adjust to the light and after a while, get used to the darkness and we can see. I've never really been in a room with no light coming in. It was a cool thing to experience.
Light travels in straight lines because we proved that with the laser. The laser shot it only straight on the wall and we saw that it was only going straight when we put the dust in the air to reflect off of it.
We can only see an object once a light ray bounces off of it and goes into our eye. If there is nothing for the light to bounce off of then we cannot see it. And we know that once it bounces off it send the rays in all directions because we can see it no matter where we stand.

Journal Entry 9/10

1. What is the path of light rays from the laser to the screen? How can you tell? - It was straight because we could see the beam and it was focused straight. You could tell because otherwise we would've seen the beam before it hit the wall.
   
2. Why can you see the spot on the wall?- We can see the spot on the wall because it hits the wall and reflects the light beams back in every direction, ultimately hitting everyones eyes.
   
3. Where can you stand to see the spot on the wall? What does this mean about the rays reflected from the wall?- You can see the light from anywhere in the room, which proves that the beams are reflected in every direction.
   
4. Why can’t you see the beam of light before it hits the screen?- Because there is nothing for the light to bounce off of we cannot see the beam.
   
5. What do you observe when chalk dust is sprinkled in the beam? How can you explain this?- we see the laser beam and what explains that is that the little particles of dust reflect the light and we see it.
   
6. Summarize the conditions necessary for you to see something - there must be a source of light and there must be something for the light to bounce off of.
   

Journal Entry 9/7 continued

The 17 tv's activity made us work as a team to reason why someone would have 17 tv's in one house. We thought of many reasons why you might have 17 televisions and then we tested each idea and tried to prove them wrong. For example you couldn't have had 17 children because there was enough beds. We learned to think differently and to reason and to test our ideas.

Journal Entry 9/7

This week in Physics i learned many things. I learned how to look at things differently and come up with reasonable results to problems. Instead of talking about doing something, we did it and learned in the process. It's difficult to make my mind work that way, to look at things the opposite way and it makes more sense to do it that way. The class was fun and interesting and gave real-life situations where we used common sense and ideas to rationalize things. It's important to connect things that we learn in school to everyday situations so that we realize how it's used.
The scientific investigations were started by observing and brainstorming reasons for what happened. Then we see what would have to be true to prove that reason.