![]() ![]() ![]() This is called constructive interference. If both waves happen to meet at a point in space while both oscillations are at their maximum, the wave we would see when we look at it would be a single wave, with twice the magnitude of each one separately. There are two interesting cases to talk about. Many waves are even simpler than that - the magnitude of the combined oscillation is simply the sum of both waves. When these two wave collide with, they add up to form a single disturbance. Now, imagine two identical waves travelling through space. It's a nice video that should teach you the basics of waves. I added a video from Veritasium's channel that talks about waves. For our purposes, we should consider a simple case where these waves are periodic in time. In the case of sound waves, for example, this "field" is the air-pressure around us - sound waves are simply disturbances to the air pressure that travel through space. We all know what waves are from our everyday lives, but what are they, really? and it's beautiful! One of my favorite wave phenomena are related to wave interference, which lead to interference patterns. Once you study what waves are, you begin to see them everywhere. In my opinion, it helps you develop intuition and see the world differently. This makes the study of waves an extremely important part of the education of physicists. Whether it's the waves on the surface of a pond or a vibrating string which are usually described by Newtons laws, light, which is an electromagnetic wave, gravity waves described by Einsteins theory, or miniature particles described by wave mechanics (aka Quantum Mechanics) - they all share many similar properties. There are many universalities to these theories, but my favorite is that they can all describe waves. You start with the basics - mechanics (Newton and his buddies from the 18th century), and gradually move towards the 19th century where you learn about electro-magnetism (Maxwell and such) and eventually you get to Quantum Mechanics and Einsteins relativity. So interference patterns look cool, but so are many other things!! why should we study them?Īs a physicist you get to study how things work. If you find physics interesting I suggest you read through (at least the introduction part!) before you skip to the pictures and videos and how-to's! * This instructable can seem a bit technical, so feel free to ask me stuff! I will also teach you how to use your laser to measure tiny objects, like the width of your hair!! It's super easy! Cameras – A camera works because the lens causes the light rays to refract.Long story short: You will learn how to observe interference patterns at home (using the cheapest laser point you got).Rainbow – Rainbows are formed when the rays of sunlight bend (refract) when they travel through rain drops.Glasses or Contacts – The lenses of glasses and contacts are designed to bend light in ways that help a persons improve vision.The following are examples of refraction that occur all around us. As a result, the light paths cross and the image appears to be flipped horizontally (left/right). This means that the light bends once when it travels through the glass cup into the water, and then it bends again when it travels out of the glass cup and into the air. ![]() Light travels fastest through air, a little slower through water, and even slower through glass. ![]() Light refracts as it passes from one medium to the next because it travels at different speeds through those mediums. air to water, water to air).ĭuring the experiment, the light traveled from the image through the air, then through the glass cup into the water, and finally out of the glass cup and into the air once more before it reached our eyes. Refraction occurs when light travels from one medium to another (ie. The scientific concept that is at work in this experiment is called refraction. Light Refraction Science Experiment Step by Step Instructional Video How Does the Science Experiment Work Do you know why the arrow appears to change directions? Find out the answer in the how does this experiment work section below. Step 4 – Look through the glass of water and watch what happens. ![]()
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