Video1

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1. You are about to watch a video called "Dr. Quantum - Double slit experiment". What do you think it will be about?

I think it is going to be about some kind of matter that can produce incisions on some kind of material.

= = 2. Go to a dictionary and copy the definition of "slit". Is it a noun, a verb? Is it is both? Mention all definitions. __**Please acknowledge the source.**__ **slit** [slɪt] //vb// **slits**, **slitting**, **slit** //(tr)//**1.** to make a straight long incision in; split open**2.** to cut into strips lengthwise**3.** to sever//n//**1.** a long narrow cut**2.** a long narrow opening[Old English //slītan// to slice; related to Old Norse //slita,// Old High German //slīzen//]

It can be a noun and a verb.

[] 3. Mention five words you think you will find in the video Incisions, pattern, speed, element, material.

===**During and after watching the video, please answer **=== Pattern 2. What's the experiment about? Describe it.** The experiment is about studying how particles and waves move. They use 3 kinds of thing, first marbles then waves and finally electrons. The experiment consist on using this 3 thing and make them pass though a square metal shape, first with 1 slit in the middle and then with 2 slits in the middle and see how they move though it and manage to finish in a wall which is behind of the metal shape. By looking at the pattern they left in the wall you can tell how was their movement. They need 2 square metal shape **S** , one with 1 slit in the middle and the other with 2 slit **S**  in the middle. They also need some kind of pool in which they can create the waves. They use two kinds **of** machine **s** , one that fires marbles and one that fires electrons. Finally they use a screen which measure **s**  the intensity in which the particles __hit it__ after going though the square metal shape.
 * 1. Are there any of the words you mentioned in the previous question in the video?
 * a.What does he need to do the experiment?

For the marbles and the waves it has two steps, for the electrons it has 4 steps.
 * b.How many steps does it have?

<span style="color: #056ef0; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;"><span style="color: #000000; font-family: arial,helvetica,sans-serif; font-size: 13px; line-height: 19px;">The first step is firing or in the case of the wave making it move though the square metal shape with 1 slit. The second step in firing or making them move though the square metal shape with 2 slit. The third step which only applies if you are firing electrons is firing them one by one instead of all together. The fourth step which only applies if you are firing electrons is that they fire the same electrons one by one though the metal shape with 2 slits and the put an observer to see though which one of the slit the electrons moves.
 * <span style="color: #056ef0; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 17px;">c.What happens in each step?

<span style="color: #056ef0; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif;"><span style="color: #000000; font-family: arial,helvetica,sans-serif; font-size: 13px; line-height: 19px;">Electrons
 * <span style="color: #056ef0; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 17px;">d. What is the third element Dr. Quantum uses?

<span style="color: #056ef0; font-family: 'Palatino Linotype','Book Antiqua',Palatino,serif; font-size: 17px;">**3. What happens with balls and one slit? And with two slits? <span style="color: #000000; font-family: arial,helvetica,sans-serif; font-size: 13px; font-weight: normal; line-height: 19px;">With one slit they create a line pattern, and with 2 slits they create a two line pattern. 4. What about waves? <span style="color: #000000; font-family: arial,helvetica,sans-serif; font-size: 13px; font-weight: normal; line-height: 19px;">With 1 slit it create a line pattern, with 2 slits they create some kind of interference pattern. 5. What happens with electrons <span style="color: #000000; font-family: arial,helvetica,sans-serif; font-size: 13px; font-weight: normal; line-height: 19px;">With 1 slit they create a line pattern just like the others, with 2 slits they create an interference pattern, and if you put an observer while firing them though the square metal shape with 2 slits you will see a two line pattern. 6. What explanation does Dr. Quantum give?** He says that when the electrons are not been observe, they divide in two and go though both slits and after they go though both slit they interfere with each other. When they are been observe they go only though one slit like if they know they are been watch.