![]() The combined effects of shoaling, refraction, and diffraction will yield the resulting wave height and direction of propagation pattern within the marina. Then the effects of diffraction and possibly further refraction as the wave propagates into the lee of the marina breakwater must be evaluated. We must also evaluate the effects of refraction on wave height and crest orientation as the wave propagates over the nearshore bottom contours from deep water to the vicinity of the marina. There must be an analysis of the change in wave height owing to the change in relative depth from deep water to the marina interior (as discussed in Chapters 2 and 3). A typical design concern would be to predict wave conditions at interior points in the marina (where vessels will be moored) for a given deep water design wave height, period, and direction. Refractive index of different material.Consider the design of a protective breakwater for a small marina that is located on the open coast. ![]() What color refracts more? Picture below shows a similar quick experiment without having a dark room.At this time you will see how different colors refract different amounts.Place a prism in the path of this light and keep a white paper behind that in a way that light passes trough the prism and gets to the paper.This makes the best light source for this experiment. Then you cover the window with black construction paper and leave only one small hole or slot about 1 mm wide and 20 mm long. You need a room that gets a lot of sun light trough a clean window. If you want to repeat this experiment, following are some hints: This experiment has been done many times and we have seen the results in books and we know that this will happen. If each color refracts a different amount, the prism must be able to separate these colors. White light consists of many different color lights. The frequency of visible light is referred to as color, and ranges from 430 trillion Hz, seen as red, to 750 trillion Hz, seen as violet.įor this experiment we pass a straight beam of white light trough a prism. ![]() So we need to test the refraction of different color lights. As we already know, different color lights have different frequencies. For this experiment we will keep all other variables constant and only change the light frequency. This experiment is designed to show how does the light frequency affect the light refraction. A series of experiments that includes a control is called a “controlled experiment.” Without a control you cannot be sure that changing the variable causes your observations. They can be the hardest part of a project. Dependable controls are sometimes very hard to develop. A control is a neutral “reference point” for comparison that allows you to see what changing a variable does by comparing it to not changing anything. The only difference is that no experimental variables are changed. It is a separate experiment, done exactly like the others. For an experiment to give answers you can trust, it must have a “control.” A control is an additional experimental trial or run. This list is called an experimental procedure. Make a step-by-step list of what you will do to answer each question. This project is an opportunity to do some experiments and find some answers to these questions.ĭesign an experiment to test each hypothesis. Also if refraction, reflection, and diffraction are just the property of material, we may be able to find materials that act differently.Īlso I want to know what other factors (if any) are involved. If it be a property of light, we may be able to find some other lights that do not refract (bend), reflect, or diffract. One major question in my mind is that if these are the properties of light or the properties of objects and material? These all shows that light refraction, reflection and diffraction are important properties that demand more attention and study. Magicians make an elephant disappear using the light reflection and mirrors. Knowledge of light is also used in magic and illusions. In a tour from an oil company, I saw a device that can identify the density and the type of oil while the oil was passing trough a glass tube with a speed of about 35 miles per hour. Light refraction has also many industrial applications.
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