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Light Crash Course Physics
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Added May 29, 2020
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some of the science of light
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here's a question for you if she shine a light on a coin that's hanging in midair what do you think it's Heather would look like you think it. I would have a bright spot of light right in the middle of it because it would it might seem counterintuitive 19th century physicists say when they tried this experiment physics in the seventeenth and eighteenth centuries scientist began to think that it might actually be a way they did experiments to test this idea and key evidence started to build the point is light is a wave Waze behaving very specific and sometimes we'd wait one of the most important reasons that I asked the way it does is known as Huygens principle Christian Huygens with the 17th century Dutch he came up with a way to predict how a wave will spread out today Haydn's principal says that you can predict the wise position in the future by analyzing is current position we have to do think of each point on the wave as a source of it either when you multiply the velocity of something by the amount of time toppled you can figure out how far it went and he said that this would also be true for individual point on the way you have a way to 2nd and disease Huygens principle you faster a bunch of points along the way they draw a circle around a point in front of the wife the right is equal to the boys for love to take * * 220 Center Camden to eat wavelet meaning that it touches each half that go exactly one point that line says the location of the wave off the two seconds things get a little more complicated that's what I Hawkins principal to the edge of a flower yes we'll talk behind me at someone use your lines can I call the wife lets you end up with a fence around the edge in a car reshape by obstacles stop code diffraction different from what a stream of particles would think it wouldn't hit the wall and places to the right why is defrag obstacles they interfere in one of two ways is it constructively when the crest of both ways end up in the same spot and so do that trough the kayak racks and lower troughs than either of the two way did the. In that case the combined parents the ways actually Disappear Completely together diffraction and interference help explain the results of the famous double slit experiment conducted by English physicist Thomas Young in 1801 in the sunlight talked with it into the room how to play with two more tiny says cut into it together so that the single beam of sunlight talk through them to Bright lines on the screen behind a tooth clip but that's not what Young so many lines on it always inspect constructively when that lined up exactly free sample to phone not mine on the screen between the teeth list the ways from each that travel exactly the same distance to buy lineup interfere constructively the places on the screen that the difference between the distances by each wave this is cool to pop difference either constructive or destructive depending on the size of the Crescent Moon line up creating constructive interference when the waves are shifted by that came off Waze not a Fool by 1.5 wave events with 2.5 and so on light Rays win to fit Bistro is equal to the distance between the center of the Earth X the sine of the angle between two points on the screen and the straight line between the splits in the screen it has the same properties as other ways by the Light unit area over time the intensity is the brightness of the light after the other ways intensity is proportional to the answer sheet so if you double the amplitude of a bright light passes through two slits like in the experiment the line in the sentence will be the most intense determine whether license visible and if so what kind of light with a higher frequency and therefore a shorter wavelength is on the blue side of the spectrum light with a lower frequency and a longer wavelength is on the other side of the different colors of light when white light passes through the Furman has rainbow colors in the lines on the screen of a double six single set to producing a person that looks like a show me the blinds to get dimmer the further you get from the center of different is there a point on the screen different ways of light travel different distances depending on the angle guarantee the split again what is the difference between the light coming from the very top of it later and then light coming from difference is equal to the time to find the angle between two points on the screen and a line straight from the split the difference between the light from the top of the slave on the lights in the sky the same holds true for the path difference between the light from the center of the slit in the bottom third time to pass different the before Wavin the corresponding light-ray that shifted by half a wavelength remember when we end up with the destructive interference you end up with Pathways that cancel each other make a dark knight now constructive interference through a single slit what little different from the path difference between the top and bottom of this will be a bright-line stop for the right interface after the previous example disorder have to do with the past difference between the individual Rays passing to the single slit boyfriend talking to the middle side and bottom. will be harmful ways that the pot so they'll cancel each other out so that talks instead it will reach the screen NBC in a depression makes the lifeways have around the Queen's edges when these diffracted waves run into each other they interfere the places where the waves interfere destructively become Shadows that's what makes the spreading out with the prices for the waves interfere constructively bright spots in the middle of old travel the same distance to the crest of the different light waves combine in the chops. the brights off zayden's by the wave theory of light about hiking principal and described as a fraction into Ferris needs the result is it double slit experiment we also find me which kind of Attraction Carson's birthday NFL station with PBS digital Studios you can head over to that channel and check out the playlist of the latest episode from shows like PBS space-time blank on blank & BBQ with Franklin this episode. Shall see Candy Crush quotes with the help of these amazing people and I'll be pretty amazing Breakfast Cafe
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