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How is the phenomenon of total internal reflection used in optical fiber technology?

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Calculate the index of refraction for a transparent material where the speed of light is 2.28x108 m/s.
Why is it not possible for total internal reflection to occur when a light beam ispassing from a medium of low optical density (air) into a medium of higher opticaldensity ( glass or water)? Thank you for the clarification.
(b) How does the index of refraction relate to the speed of light in a medium? If the index of refraction of water is 1.33, calculate the speed of light in water. Give one application of total internal reflection.
The display windows of some department stores are slanted slightly inward at the bottom. This is to decrease the glare from streetlights or the Sun, which would make it difficult for shoppers to see the display inside. Sketch a light ray reflecting from such a window to show how this technique works.
What is the critical angle for total internal reflection for glass in air? Assume that nglass= 1.50 and nair = 1.00.
At what angle inside glass is light totally internally reflected? At what angle inside a diamond is light totally internally reflected?
An engineering student is designing a way to harness the energy of the Sun. Her plan is to direct a concave mirror towards the Sun, with the expectation that the power produced at the location of the image will be greater than or equal to 330 W. At this location, the intensity of the electromagnetic radiation from the Sun is 1.00 kW/m². (a) Assuming the Sun subtends an angle of 0.533° at the Earth, find the required radius Rå (in m) of the circular face area of the mirror. > Ra m (b) Now suppose the light intensity is to be at least 104 kW/m² at the image. Find the required relationship between R₂ and the radius of curvature R of the mirror. Ra R ≤
The critical angle for total internal reflection within a fiber optic cable is θC = 24.1°. What is the index of refraction (n) for the material it's made from?
Fiber optics is one application of total internal reflection that is in wide use. In communications, it is used to transmit telephone, internet, and cable TV signals. Fiber optics employs the transmission of light down fibers of plastic or glass. Because the fibers are thin, light entering one is likely to strike the inside surface at an angle greater than the critical angle and, thus, be totally reflected. If fiber optics were not invented, what do you think is its impact to our education today?
The figure shows a liquid-detecting prism device that might be used inside a washing machine or other liquid-containing appliance. If no liquid covers the prism's hypotenuse, total internal reflection of the beam from the light source produces a large signal in the light sensor. If liquid covers the hypotenuse, some light escapes from the prism into the liquid and the light sensor's signal decreases. Thus a large signal from the light sensor indicates the absence of liquid in the reservoir. If this device is designed to detect the presence of water, determine the allowable range for the prism's index of refraction n.
Fiber optic cables, such as those used for high-speed communication (Internet & phone services), transmit signals as light pulses through transparent cables. When viewed from one of the ends, you can see these light pulses, but when viewed from the side you can't. Using your knowledge about reflection and refraction, explain how this might work. Is there some physical limitation where this might not work?