At night, a person (in air) stands, at the edge of a water-filled swimming pool with a flashlight in hand, looking down at an angle into the pool for a set of car keys (he/she) dropped accidentally to the bottom of the pool earlier in the day. The flashlight is adjusted until the keys can be seen. The vertical distance from the flashlight to the water is 1.5m. The horizontal distance from the flashlight to the point at which the light beam enters the water is 1.7m. The pool is 5m deep. What is the horizontal distance, measured from the from the edge of the pool, starting at the bottom, to the keys? Consider the index of refraction for both air and water in your calculations.
Refraction of Light
Refraction is a change in the direction of light rays when they travel from one medium to another. It is the bending of light when it goes through different media.
Angle of Refraction
Light is considered by many scientists to have dual nature, both particle nature and wave nature. First, Particle nature is one in which we consider a stream of packets of energy called photons. Second, Wave nature is considering light as electromagnetic radiation whereas part of it is perceived by humans. Visible spectrum defined by humans lies in a range of 400 to 700 nm wavelengths.
Index of Refraction of Diamond
Diamond, the world’s hardest naturally occurring material and mineral known, is a solid form of the element carbon. The atoms are arranged in a crystal structure called diamond cubic. They exist in a huge variety of colours. Also, they are one of the best conductors of heat and have a very high melting point.
At night, a person (in air) stands, at the edge of a water-filled swimming pool with a flashlight in hand, looking down at an angle into the pool for a set of car keys (he/she) dropped accidentally to the bottom of the pool earlier in the day. The flashlight is adjusted until the keys can be seen. The vertical distance from the flashlight to the water is 1.5m. The horizontal distance from the flashlight to the point at which the light beam enters the water is 1.7m. The pool is 5m deep. What is the horizontal distance, measured from the from the edge of the pool, starting at the bottom, to the keys? Consider the index of refraction for both air and water in your calculations.
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