this week in science

this week in science, we discussed the last things that we would need for the test on Monday the 19th.

we discussed that the waves in a pool spread out and bounce off objects just like they do from a light source bouncing off objects.

When there is an object blocking a wave from passing, the part of the wave that is blocked will be stopped and will not pass, but the part of the wave that is not blocked, will pass around the object blocking the other half of the wave.

The other thing we learnt was that the different surfaces that light hits off, has a different texture, so therefore, it reflects the light in a different manner.

We also learnt that when light hits glass, the light would refract because when light goes from a less dense medium to a higher dense medium, the light slows down and changes direction and this is called refraction.

When drawing this refraction, the light always goes through the denser medium and bends down towards the normal line. There is a specific formula but Mr. Finley and Mr. Segen said that doesn't matter.

This is important to us because when water is on our wind shield, the water refracts and makes every thing seem bent because of refraction that takes place when the light passes through the water on the wind shield.

this week in science

this week in science, we were discussing what other forms that light could travel in other than straight lines like we have expressed in previous discussions and experiment drawings that we have drawn.

We have read that in the 1600's, Isaac Newton thought of a ray diagram that consists of light rays traveling in the form of waves or particles. The wave model is better to use when we are talking about shadows. We explain shadows as when the waves gets topped by a solid and still bend around the object making the dark part very crisp. But as the waves hit the edge of the solid substance, they bend around the substance and travel while spreading out and when they hit the ground, then they have light around this darkness which is caused by the light blocked off by the solid substance.

The particle model explains how we see. the balls or particles bounce off objects and go into my eye causing me to see what ever they bounced off.

We were led into this discussion on how else does light travel. So we compared i to when we bounced basketballs and dripped water droplets into a small collection of water and saw how the waves\ripples traveled through the water and would not go behind a solid substance which was in the water.-the ripples would not go through the solid substance, but they go around the solid mass and spread all over the water quickly.

Back to the particle models

The particle model claims that the particles bounce off the masses that they hit bouncing particles everywhere. and then, those particles go into our eyes letting us see what the y bounced off of.

The wave particle model claims that the waves are just like the light rays and they travel like the light rays and they bend around a mass and and light casts on the ground. and the parts that the light could not reach due to the mass, is called the shadow.

Thats what we learnt in science,(i think) jkjk

this scientific ideas that we should know about shadows are: when we want ot make a shadow, all we have to do is stand and we know how to focus our shadow when we want to and make our shadow fuzzy and blurry if we want.

We would be able to keep something cool if we want by blocking off light that could fall onto the object we want to keep cool.

scince in October

This week in science,

this week in science, i learnt that when the laser i pointed at a mirror, the same angle that it is shot at, in the same angle, the laser will leave the mirror.

as you see, the ray comes and hits the mirror at a at a 45 degree angle. Then when leaving the mirror, the light ray leaves at the exact same angle that it came and hit the mirror.

I was able to test this in class because in my experiment, we glued a protractor and pointed a laser pointer at a certain angle. Then we put some flour and poured it on the laser beams. and the laser beams bounced off the particles of dust showing us the direction of the beam of laser. Then, we were able to see that the angle that we pointed the laser at, on the opposite side, the laser left at the exact same angle.

I learnt this by thinking

"how will we be able to measure the angle that the ray of light comes and leaves at?"

Then when we are measuring angles, we need a protractor. So, we have to include a protractor. and we need to see the ray to be able to measure it. so, we but some dust in the beam for the beam to bounce off the dust and we were able to see the rays, and we measured the angles they came and left. At 80 degrees, the rays of the laser came and left at the same angle.

We should Know this because in case we want to light some place up for a laser show, we should be able to reflect the light in directions we want to move the light where we want to.