Light And Geometric Optics Of Light - 1565 Words

Light and Geometric Optics. That is the title for Unit D. Unit D deals with the electromagnetic spectrum, Ray models of light, Refraction, and a lot of other topics. Light is used in many different ways. Mirrors and televisions use light so you can see yourself and the show you are watching. The light bulbs we utilize use different sources of light for power. We have advance and have been able to find many uses for many different things that give us light. But first we must know how light works. Light is part of the Electromagnetic spectrum. The Electromagnetic spectrum is made up of a range of Electromagnetic radiation that extends from the shortest gamma ray to the longest radio waves. The rays are in this order: radio†¦show more content†¦There is a equation for calculating the speed of the wavelengths. The frequency is f and the wavelength is . Speed equals v. Therefore V = f x wavelength . An example of this would be the following question. The wavelength is 10 and the frequency is 2. So the speed of the waves would equal 20 cm / s. Wave models of light help us understand the similarities between light and the movement of water to explain properties of light we can t see. Refer to diagram 2.1 for example. For example of this we can look at a prism. When a white light shines through it, it splits into seven different colors. ROYGBIV: Red, Orange, Yellow, Green, Blue, Indigo, and violet. This is called the visible spectrum. While the most important light source is the sun, light can also be produced by animals and plants. This ability is called Bioluminescence. Bioluminescence is very common among the creatures of the sea. Only 10% of sea animals are not Bioluminescence. The animals that are Bioluminescent use their ability to attract prey or to keep their schools together. They are able to dim their lights if they sense a predator approaching. There are many other sources of light such as the following six. Incandescent, Fluorescent, Phosphorescent , and Chemiluminescence, triboluminescence, Electric Discharge. Incandescent is a light that is made by a type of object . A incandescent light bulb has a thin piece of metal inside of the bulb, which is called a