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OVERVIEW
The topic "Refraction of Light" was chosen by the author as the final project for the subject Physics for Engineers/Engineering Technologists (Lab). In other words, students should have different topics in LR#5.
The topic "Refraction of Light" was chosen by the author as the final project for the subject Physics for Engineers/Engineering Technologists (Lab). In other words, students should have different topics in LR#5.
LEARNING OBJECTIVES:
At the end of this module, the student is expected to:1. Explain how refraction occurs.2. Identify some natural applications of refraction.
At the end of this module, the student is expected to:1. Explain how refraction occurs.2. Identify some natural applications of refraction.
REFRACTION
Refraction is the bending of light as it passes from one medium to another. We are able to create lenses, magnifying glasses, prisms, and rainbows because of this bending caused by refraction. Even our eyes rely on this bending of light. We wouldn't be able to concentrate light onto our retina without refraction. The most common example is the refraction of white light in a prism shown in the picture, bending wavelengths of light of different amounts producing a rainbow. As observed, the prism bent the violet light the most and the red light the least. Furthermore, light refracts whenever it travels at an angle into a substance with a different refractive index (optical density) and refractive index varies according to wavelength. The purpose of this laboratory experiment is to confirm the light refraction phenomenon by using only a glass of water and a paper. Shown below are the actual video of the experiment as well as the corresponding laboratory report.
Refraction is the bending of light as it passes from one medium to another. We are able to create lenses, magnifying glasses, prisms, and rainbows because of this bending caused by refraction. Even our eyes rely on this bending of light. We wouldn't be able to concentrate light onto our retina without refraction. The most common example is the refraction of white light in a prism shown in the picture, bending wavelengths of light of different amounts producing a rainbow. As observed, the prism bent the violet light the most and the red light the least. Furthermore, light refracts whenever it travels at an angle into a substance with a different refractive index (optical density) and refractive index varies according to wavelength. The purpose of this laboratory experiment is to confirm the light refraction phenomenon by using only a glass of water and a paper. Shown below are the actual video of the experiment as well as the corresponding laboratory report.
FINAL PROJECT
FINAL PROJECT
Salazar_BSCE2B_LR#5_Final Project.pdfThe first thing I did is draw two arrows of the same direction on the topmost and bottommost part of the paper. Then, I moved the paper up and down behind the glass and observed what happens to the arrow. Obviously, the concept that will explain the phenomenon that happened to the arrow is refraction. But before explaining that, I will give some applications of refraction that occur in nature. First is the formation of rainbow. When the light from the sun is scattered by water droplets such as raindrops, rainbows are formed. Refraction occurs when the light from the sun changes direction as it passes through a different medium such as a raindrop. Another application is the seemingly twinkling of stars. Twinkling of stars take place due to atmospheric refraction. In layman's term, twinkling of stars is caused by the passing of light through different layers. These layers have different densities and temperatures. Due to this, light rays bent (refracted) many times in random direction. Thus, stars appear to twinkle.
For instance, the arrow changed its direction because of the bending of light called refraction. Light refracts whenever it travels at an angle into a substance with a different refractive index or optical density. In layman’s term, refraction occurs as the light passes from one medium to another. In the laboratory experiment, there are three different mediums used namely air, water and glass. The refractive index of air is 1.00, the water is 1.33 and the glass is 1.50. When the light travels from air into water, it slows down, causing it to continue to travel at a different angle or direction. In other words, the change of direction of the arrows is called refraction and it happens because the light slows down as it enters the glass and speeds up again as it leaves. Note that light refracts as it passes from one medium to another because light travels at different speeds in different mediums. Light travels fastest through air, a little slower though water, and even slower through glass.
REFLECTION
In physics, refraction is the change in speed and direction of a wave as it enters a new medium. This laboratory experiment is mainly focused in refraction of light, though refraction may occur in sound waves and water waves. The arrow changing its direction when held behind the glass really amazed me. It was my first time to conduct such experiment since the idea of refraction as the main topic in my final project just crossed my mind while watching videos of physics experiments. At first, I was not so sure if the topic refraction of light is a physics concept. Through further researches, I found out that refraction is actually under the physics branch of science. Nevertheless, this experiment taught me that several phenomena in nature are actually explained by the refraction of light such as the formation of rainbow, why pools look shallower than it really is, and why stars appear to twinkle even if they do not. Also, lenses, magnifying glasses, and prisms are created because of refraction. Even our eyes rely on this bending of light. We wouldn't be able to concentrate light onto our retina without refraction.
In physics, refraction is the change in speed and direction of a wave as it enters a new medium. This laboratory experiment is mainly focused in refraction of light, though refraction may occur in sound waves and water waves. The arrow changing its direction when held behind the glass really amazed me. It was my first time to conduct such experiment since the idea of refraction as the main topic in my final project just crossed my mind while watching videos of physics experiments. At first, I was not so sure if the topic refraction of light is a physics concept. Through further researches, I found out that refraction is actually under the physics branch of science. Nevertheless, this experiment taught me that several phenomena in nature are actually explained by the refraction of light such as the formation of rainbow, why pools look shallower than it really is, and why stars appear to twinkle even if they do not. Also, lenses, magnifying glasses, and prisms are created because of refraction. Even our eyes rely on this bending of light. We wouldn't be able to concentrate light onto our retina without refraction.
REFERENCES:
https://plato.stanford.edu/entries/physics-experiment/https://www.sciencelearn.org.nz/resources/49-refraction-of-lighthttps://coolscienceexperimentshq.com/light-refraction/https://www.iop.org/explore-physics/at-home/episode-4-reversing-arrow#grefhttps://sciencenotes.org/wp-content/uploads/2021/10/Refraction-Definition-1024x683.pnghttps://sciencenotes.org/refraction-definition-refractive-index-snells-law/https://t4.ftcdn.net/jpg/02/98/68/73/360_F_298687332_D0GAA6fAgr70NWtF8UKXPyLx0mTGug0x.jpghttps://i.pinimg.com/originals/ff/cf/d1/ffcfd1e82699b5b51e2f20438a9d8ccc.jpghttps://wallpaperaccess.com/full/53084.jpghttps://www.teahub.io/photos/full/184-1844982_1080p-space-background-gif.jpghttps://i.pinimg.com/originals/32/96/9c/32969c8d097e908ffa28514c98253454.jpghttps://wallpaperaccess.com/full/4149226.jpghttps://i.pinimg.com/originals/5c/ad/e6/5cade6da6c5e0eed3bc7f59e03c36c42.jpghttps://cutewallpaper.org/cdn-cgi/mirage/dd19f2d06ebc24f541f142b37b4289ffa7de722a7607e39984c5c6dd4ce8defd/1280/27x/1vzl6pojd/142661618.jpg
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