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Applications Of Refraction

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Published in: Physics
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The PPT will describe about Refraction has numerous practical applications in daily life and technology.

Damodar T / Dubai

22 years of teaching experience

Qualification: M.Sc B.ed

Teaches: Physics

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  1. PhYSics GRADE Chapter 17 Refraction and Lenses Sec 17.2: Applications of refraction
  2. Previous Nexte Total internal reflection Total internal reflection The phenomenon which occurs when the light rays travel from a more optically denser medium to a less optically denser medium with an incident angle larger than the critical angle. What are the applications of total internal reflection?
  3. Total Internal Reflection — Optical Fibers Optical fibers are an important technical application of total internal reflection. The light traveling through the transparent fiber always hits the internal boundary of the optical fiber at an angle greater than the critical angle, so all the light is reflected and none of the light is transmitted through the boundary. Thus, the light maintains its intensity over the distance of the fiber. _—n2 (Cladding) > t72 n, (Glass fiber)
  4. Total Internal Reflection — Optical Fibers VirK about Il How does the light traveling through a transparent fiber maintain its intensity over the distance of the fiber? Answer: Optical fibers are an important technical application of total internal reflection. The light traveling through the transparent fiber always hits the internal boundary of the optical fiber at an angle greater than the critical angle, so all of the light is reflected and none of the light is transmitted through the boundary. Thus, the light maintains its intensity over the distance of the fiber. HuhM0de fiber
  5. MEDICAL USE OF OPTICAL FIBRES Optical fibres are often used in medical procedures One example is to use an endoscope to illuminate and visualise areas that couldn't normally Two of the main fibre optic features used in an endoscope are cables that light up (illuminate) the inside of the stomach. The other main feature is a fibre optic viewing cable that allows you to see what the problem is
  6. Uses of optical fibers he Optical fiber communication process transmits a signal in the form of light which is first converted into the light from electrical signals and transmitted, and then vice versa happens on the receiving side. Optical fibres are often used in medical procedures. One example is to use an endoscope to illuminate and visualise areas that couldnt normally be seen. Doctors used to have to operate to see what the problem was.
  7. The visible light spectrum D The speed of light in a medium is determined by interactions between the light and the atoms that make up the medium. - The colours that make up white light are called the spectrum. - Every colour has different wavelength • the speed of light and the index of refraction vary for different wavelengths of light in the same medium. The Visible Light Spectrum The visible Light spectrum is the section of the electromagnetic radiation spectrum that is Visible to the human eye. ± 5-520 520-500 Wavelength (nanometers) T houghtCo.
  8. Dispersion of Liqht (cont.) o The speed of violet light through glass is less than the speed of red light through glass. Which one of them refracts more? About It White Light Glass prism
  9. Dispersion of Liqht (cont.) Violet light refracted more than red because the speed of violet light through glass is less than the speed of red light through glass. s the speed ecreases, the inde White Light Glass Prism efractiepjncrea The index of refraction for a given material also depends on the color of the light being refracted Orange Yellow Green Blue I ndigo Violet
  10. Dispersion of Liqht (cont.) White light separates into a spectrum of colours when it passes through a glass prism. This phenomenon is called dispersion White Light Glass Prism The index of refraction for a given material also depends on the color of the light being refracted Red Orange Yellow Green Blue Indigo Violet
  11. Dispersion of Light (cont.) A prism splits a ray of white light into the colours of the rainbow. This process is known as dispersion. The colours that make up white light are called the spectrum. The order of the colours in the spectrum is always the same. thi# phrase remember the prder Qf gplpgr.q: Richard Of York Gave Battle In Vain
  12. Recombining colours What happens when the spectrum passes through a prism? When the spectrum made by the first prism passes through a second prism, the colours are recombined to make white light again.
  13. Dispersion of Light (cont.) A prism is not the only o means of dispersing light. DA r inbow is a spectrum formed when sunlight is dispersed by water droplets in the atmosphere. iffil_
  14. ea •n red top o f rd. Dispersion is responsible for rainbows The most Striking Of is a Without rain—droplets of rain. that into its cornponent physiQl is shown in Figure 17.15 Here see a Of sunlight, When enlers it into and light the back the drop. and and it the drop, Of the light it from Water to incident dire.tion. is to 4? , on the light '1k' specific, Violet light of 400 , rd to an angle of 42' Read the paragraph titled by" IS ersion keponsible fed in in your copy book page to explain how rainbow occurs
  15. https://www.thoughtco.com/the-visible-light-spectrum-2699036 https•/1mammothmemory.net/physics/refraction/medicaI-use-of- optical-fib re*' medical-uses-of-optical-fibres.html

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