Reflection and Refraction of Light
REFLECTION:
Reflection of light is the change of direction that light experiences when it collides with an object and "bounces." The reflection of light makes it possible to see objects that do not emit their light . There are several applications of the reflection. One example is the "The Laugh House" of an amusement park, the person will probably see a very distorted image in a curved mirror. Similar deformations occur in the concavity of a shiny spoon or on the polished surfaces of a coffee machine or a car. Images look different due to irregular surface curvature; They have rays that behave according to the law of reflection. It is possible to collect a real image on a screen. Here, an image of the window has been collected on a frosted glass sheet and the observer can see the image. These rays cross each other since the image is inverted, but the place where they are cut is not a focus because they are not rays that come originally from the same point. Even without the screen, the image is still there, and it is possible to observe.
Another application of reflection is the parabolic reflectors that are under use in the headlights of automobiles with the lamp near the focus, to send a light beam almost parallel, to illuminate only the road. Larger telescopes use parabolic reflecting mirrors. The mirrors are constructed parabolic to focus on the almost parallel light rays that come from distant stars. The placement of a candle lit in front of a sheet of glass will generate an image of a candle reflected in a mirror. Putting a bottle full of water in the same place that occupies the image, the created illusion is that the candle is lighted inside the water.
REFRACTION
Refraction of light is the change of direction that light undergoes when it passes from one transparent substance to another . One application of the refraction is when the light coming from a star penetrates into the Earth's atmosphere, it encounters increasingly dense air layers, and therefore, with increasing refractive indexes. Because of this, this light undergoes successive refractions, approaching the no-evil, so when an observer receives the light from the star, it seems as if that light came from point 1 located in the prolongation of the refracted ray what the observer receives. In other words, what you see is a virtual image of the star, produced by the refraction of light from the Earth's atmosphere.
A second application of the refraction is when a ray of sunlight (white light) penetrates into a drop, it is refracted and undergoes decomposition. The multicolored beam has a reflect on the inner surface of the drop and when it leaves it retracts again, which causes a greater separation of the colors. This dispersion occurs in all drops that are receiving light from the sun. On a hot day, the air on pavement can be considerably hotter than the air located even higher. Not only does this air distort what is seen through it because of the uneven refraction of light, but it can also cause reflections on the upper part of the hot layer. This layer reflects the sky as it does the surface of a pond, the pavement looks as if covered with a sheet of water.
Works Cited
My School House. Reflection & Refraction. 2015. Web. 25 January 2017.
Science Premier. Light Reflection and Refraction. 2015. Web. 25 January 2017.
