Journal Entry 12/14

It means that the bus is consistently gaining speed. Specifically it gains 1 more meter per second than the previous second. So at 1 second it will move 1 m and at 2 seconds it will be at 3 m and at 3 seconds it will be at 6 m and so on.

At 5 seconds it will be at 15 m. I continue the pattern and end up with 15 m.

journal entry 12/7

Constant velocity means that you are moving at a consistent speed and covering the same amount of ground per second. Constant acceleration means that you are accelerating at the same rate per second, but coving a different amount of ground each second.

No an object cannot have both because in order for something to be accelerating, it needs to have a consistently increasing speed.

Depending on the speed of the cars, the one with constant acceleration, if moving fast enough would win the race. But if the car with constant velocity is fast enough then it can win the race.

Journal Entry 11/30

For an object to be moving in one direction means that it can only move in 2 ways. It can only move one way or another. It cannot go any other way in 1 dimension.

Yes the real life motion changes because it's being compared to a different thing. It is being described or seen in relation to the different axis.

If an object has a negative velocity it only means that its moving backwards, therefore having negative speed. With positive velocity it will be moving forwards.

Journal Entry 11/16

An observer who would see the ball moving at 100kmh would have to be on the truck. They would have to be facing the same way as the ball was facing. Their object of reference would be the truck.

An observer who would see the ball as not moving would have to be on the ground. When the ball is shot at 100kmh from the truck thats traveling at 100kph then it will fall straight to the ground as seen in the video. Their object of reference would be the ground.

An observer who would see the ball as moving more than 100kmh would have to be moving faster than the truck itself. So that when it is dropped the observer would be moving away from it at more than 100kmh which would make it appear to be moving at more than 100kmh. Their object of reference would be their car because of the fact that they aren't on the same truck.

The observer on the ground is right because the ball really does not move. The motion of the truck going 100kmh cancels out the ball shooting out at 100kmh. As seen in the movie, the ball just falls straight down. They cancel each other out. The ball moving backward after it touches the ground is because the ball was spinning. The ball just falls straight down.

Journal Entry 11/2

Host: Hello folks, today we have two special guests. Bryan and John who are going to debate over whether or not the moon landing was a hoax or not. Give a round of applause of John and Bryan!!

Bryan: Well, the first reason that the moon landing was definitely a hoax was because they did not have the technology to safely bring them there and back. Their computer technology was restricted to doing only simple numerical tasks. Their computers were like modern day calculators.

John: Well there was enough technology to control the spacecraft from the ground remotely so during that time that was definitely enough. The spacecraft was able to do its job and that was to land on the moon safely, and that it did.

Host: Bryan what do say to these explanations?

Bryan: Well I still don't believe that they could have gotten there with such little knowledge of computers and technology. But another reason to doubt it is because when the footage of the flag being hung up on the moon, the flag moves with the wind, but everyone knows that there is no air, no wind, no atmosphere to move that flag. That in my opinion proves that it was staged in a studio and that it is indeed a hoax.

John: Well, If you had researched this matter you would know that the moon has a very hard surface, and in order for the flag to be securely mounted, It needed to be "screwed in" with a twisting motion which moved the flag like that. I would also like to point out that in the footage when they walk by the flag it does not move at all, which indefinitely indicates that there was no atmosphere, and that the footage was indeed shot on the moon's surface. A simple experiment like trying to put a replica flag in the ground would show that even if there was minimal wind on the earth that it moved the flag like that.

Bryan: That may be so but then explain this: Why aren't there any stars? The fact that none of the pictures show stars undoubtedly proves that the pictures are fake. They were in the middle of space with a clear view of outer space.

John: Once again, If you had researched this and done a simple experiment you would see that even this claim is untrue. Take any camera and try to take a picture of the stars. Near any bright light the stars would not be able to be seen. The brighter light overpowers the small twinkle of the stars. This has been proved over and over again with many different cameras.

Bryan: Well no matter what you say I still believe that it was a hoax.

John: Yea keep telling yourself that!!

Host: Until next time, have a good night!

Journal Entry 10/26 continued

Journal Entry 10/26

I scanned this picture.

The whole thing was easy because we have done this so many times before.

History of discovery in light and vision continued

Euclid was a greek mathmatician who wrote many things, including works on perspective and on geometry. He described how things get smaller as they get farther away. He also wrote on perfect numbers and prime numbers. His writings showed that perspective is in everyday life and everywhere we look.
Empedocles was a greek philosopher who was best known for his work with four elements. He suggested that everything in the universe was made up of 4 elements; water, air, earth, and fire. The interesting story about him was that he threw himself into a volcano believing that he was immortal. He believed that light traveled in a straight line and at a very high rate of speed.
AlHazen studied optics and made very big contributions to the principles of optics. He wrote the Book of Optics and studied binocular vision. He probably built off of Euclid"s idea of perspective. He also studied how light broke up into different colors and he said that light rays were streams of energy particles traveling in straight lines.
Isaac Newton invented the refracting and reflecting telescope. He developed a theory that a prism decomposes white light to all the colors of the spectrum. He studied refraction and fixed the problems of the refracting telescope by make a reflecting telescope. He said that colored light did not change its properties. He believed that light was a stream of particles just like Alhazen.

Journal 9/21 continued

In a completely dark room we wouldn't be able to see anything. There wouldn't be any light rays to bounce off of anything to go back to our eyes. Nothing would be visible, even though our eyes would be much more sensitive to light. Our classroom wasn't completely dark otherwise we wouldn't be able to see anything at all. For a room to be completely dark, no light rays can enter the room. We couldn't totally seal off the room and make sure no light comes in.

Journal Entry 10/19

The image is really there but there is no other orange in the mirror or behind the mirror. I wouldn't agree with him because the image of the orange is really there. I would try to convince him that it was really there because no matter what you do it will always be there. The image cannot be an illusion because it is always there. Linda's idea of the image being on the surface is not reality because when we performed the experiment we showed that the image is behind the mirror. It is in the exact same spot as in front of the mirror only opposite and in the back of the mirror. I would show her that when rulers are pointed at the image and are connected, where they intersect is where the image is. It is not on the surface of the mirror but behind it.

Journal 9/21 continued

In a completely dark room we wouldnt be able to see anything. There wouldnt be any light rays to bounce off of anything to go back to our eyes. Nothing would be visible even though our eyes would be much more sensitive to light. Our classroom wasnt completely dark otherwise we wouldnt be able to see anything at all. For a room to be completely dark, no light rays can enter the room. We couldnt totally seal off the room and make sure no light comes in.

History of discovery in light and vision

Euclid was a greek mathmatician who wrote many things including works on perspective on on geometry. He described how things get smaller as they get farther away. He also wrote on perfect numbers and prime numbers. His writings showed that perspective is everyday life everywhere we look.
Empedocles was a greek philosopher who was best known for his work with four elements. he suggested that everything in the universe was made up of 4 elements; water, air, earth, and fire. The interesting story about him was that he threw himself into a volcano believing that he was immortal. he believed that light traveled in a straight line and at a very high rate of speed.
AlHazen studied optics and made very big contributions to the principles of optics. He wrote the Book of Optics and studied binocular vision. He probably built off of Euclids idea of perspective. he also studied how light broke up into different colors and he said that light rays were streams of energy particles travelling in straight lines.
Isaac Newton invented the refracting and reflecting telescope. He developed a theory that a rism decomposes white light to all th colors of the spectrum. He studied refraction and fixed the problems of the refracting telescope by make a reflecting telescope. He said that colored light did not change its properties. He believed that light was a stream of particles just like Alhazen.

review of light fantastic

The movie really showed how the study of light and where it comes from evolved. The fact that people really wanted to know how they see things and how light travels really shows that people wanted to explain life. The part that showed why things appear smaller, farther away was interesting to me. I never really thought how the size of something close directly compares to the size of something far. The movie also showed how the understanding of how light works evolved to the current understanding of light rays and how they move in a straight line.

Jounal Entry 10/5

The things we've learned in our class can easily be connected to the real world. For example, when i look into a puddle after it has rained and see the reflection of the things around me. Its because of the rays bouncing off of the objects to the puddle and bouncing into my eye. Another example is when i wake up at night i can see things in my room because my eyes have adjusted to the darkness. That's because of my pupils expanding so that more light rays can come into my eyes. All the explanations make sense because of the way light rays act normally.

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.