An optical fiber with circular cross section has refractive index 1.45. It’s surrounded by a cladding with refractive index 1.43. (a) Find the maximum angle relative to the fiber axis at which light can propagate down the fiber by undergoing successive to-tal internal reflections. (b) Find the speed of light in the fiber. (c) For the angle you found in part (a), find the speed at which light actually makes its way along the fiber—that is, the length of fiber that the light traverses per unit time. Note that this isn’t the same as your answer to (b) because the light bounces back and forth rather than following a straight path along the fiber.
An optical fiber with circular cross section has refractive index 1.45. It’s surrounded by a cladding with refractive index 1.43. (a) Find the maximum angle relative to the fiber axis at which light can propagate down the fiber by undergoing successive to-tal internal reflections. (b) Find the speed of light in the fiber. (c) For the angle you found in part (a), find the speed at which light actually makes its way along the fiber—that is, the length of fiber that the light traverses per unit time. Note that this isn’t the same as your answer to (b) because the light bounces back and forth rather than following a straight path along the fiber.
An optical fiber with circular cross section has refractive index 1.45. It’s surrounded by a cladding with refractive index 1.43. (a) Find the maximum angle relative to the fiber axis at which light can propagate down the fiber by undergoing successive to-tal internal reflections. (b) Find the speed of light in the fiber. (c) For the angle you found in part (a), find the speed at which light actually makes its way along the fiber—that is, the length of fiber that the light traverses per unit time. Note that this isn’t the same as your answer to (b) because the light bounces back and forth rather than following a straight path along the fiber.
An optical fiber with circular cross section has refractive index 1.45. It’s surrounded by a cladding with refractive index 1.43. (a) Find the maximum angle relative to the fiber axis at which light can propagate down the fiber by undergoing successive to-tal internal reflections. (b) Find the speed of light in the fiber. (c) For the angle you found in part (a), find the speed at which light actually makes its way along the fiber—that is, the length of fiber that the light traverses per unit time. Note that this isn’t the same as your answer to (b) because the light bounces back and forth rather than following a straight path along the fiber.
Definition Definition Rate at which light travels, measured in a vacuum. The speed of light is a universal physical constant used in many areas of physics, most commonly denoted by the letter c . The value of the speed of light c = 299,792,458 m/s, but for most of the calculations, the value of the speed of light is approximated as c = 3 x 10 8 m/s.
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