False.
The minimum index of refraction for total internal reflection at a 45-degree angle is 1.41. This means that the glass or plastic prism would need to have an index of refraction greater than or equal to 1.41 to achieve total internal reflection at that angle.
Total internal reflection occurs when the incident angle is greater than the critical angle, causing light to be reflected back inside the medium rather than refracting out of it. This phenomenon is commonly seen in prisms and optical fibers.
Mirage is a good example which is seen due to refraction of light and especially due to total internal reflection. ============================ A semi-opposing opinion: No reflection is required for the creation of a mirage, only refraction. ============================= Hope you might have heard about the conditions for total internal relection to take place. 1) Ray has to traverse from denser to rarer 2) the angle of incidence is to be more than critical angle of the denser medium So in such a case the refraction phenomenon cannot take place and so all the energy to be refracted is sent back to the denser medium itself. Hence named as total internal reflection. Of course total internal reflection is totally different from ordinary reflection.
Mirage due to total internal reflection occurs when warm air near the ground bends light rays from the sky, creating a false or displaced image of distant objects. This phenomenon happens because of the temperature gradient that causes light to travel along a curved path, leading to the illusion of water or a reflective surface on the road.
total internal reflection is used in fibre optic cables as it allows for light signals to be sent across literally as long as you want. the light is never lost and can pass through stations in which the light strikes certain triggers which will produce a message allowing for the fast delivery of messages across long distances. Hope this was helpful
periscope is an example of total internal reflection.
you can demonstrate total internal reflection using a light source and glass gratings.
Binoculars use prisms to ensure that the light entering the lenses undergoes total internal reflection to produce an upright and correctly oriented image for the user. The prisms inside the binoculars redirect the light path so that it passes through the lenses twice, maintaining image integrity and reducing the overall size of the binoculars while providing a wide field of view.
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Total Internal Reflection
total internal reflection
Optical fibers use total internal reflection to guide light signals for telecommunications and internet connectivity. Reflecting prisms in binoculars and periscopes use total internal reflection to redirect light without losing brightness. Reflecting mirrors in digital projectors use total internal reflection to display images onto a screen. Diamond gemstones sparkle due to total internal reflection within the stone. Some sensors and detectors employ total internal reflection to detect changes in the refractive index or presence of substances.
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Total Internal Reflection
Total internal reflection is used in fiber optic communication systems, where light signals are transmitted through optical fibers by reflecting off the inner walls due to total internal reflection. It is also used in prism-based devices like binoculars and periscopes to redirect light and form images. Additionally, total internal reflection is utilized in diamond jewelry to enhance its brilliance and sparkle.
Total internal reflection typically occurs in materials with a higher refractive index than air, such as glass or water. Iron, being a metal, has a lower refractive index than air, so total internal reflection is not likely to occur in iron substances.
Total internal reflection occurs in a prism when light traveling through the prism hits the boundary between the prism and the surrounding medium at an angle greater than the critical angle. This causes the light to reflect back into the prism instead of refracting out of it, resulting in total internal reflection.