A nearsighted person cannot read a sign that is more than 5.2 mfrom his eyes. To deal with this problem, he wears contactlenses that do not correct his vision completely, but do allow him to readsigns located up to distances of 12.0 m from his eyes. What is the focallength of the contacts?
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.
A nearsighted person cannot read a sign that is more than 5.2 m
from his eyes. To deal with this problem, he wears contact
lenses that do not correct his vision completely, but do allow him to read
signs located up to distances of 12.0 m from his eyes. What is the focal
length of the contacts?
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