Name of the Medium Light that Travels Faster
In which of the following medium light travels faster? a) Glass b) Water c) Plastic d) Air.
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The most fast light travels through air.
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Light is a form of energy which enables us to see an object from which it comes(reflected or refracted).
It is a electromagnetic radiation which do not requires any material medium for their propagation.
The index of refraction is a property of transparent materials - such as glass, water, air, and plastic - materials through which light can pass. When a photon passes through such a material, it interacts with the electrons and slows down in a precise way. The speed of light in every material we've ever observed (or modeled) is always LESS than the speed of light in a vacuum.
We denote the index of refraction by a number n, with n > 1. Water, for example, has an index of refraction of 1.33. The speed of light in that material is c/n - in the case of water, it's (300,000 km/s)/(1.33) = 225,000 km/s. In other words, the larger the index of refraction, the slower light travels through it.
The indices of refraction of the materials you asked about are:
glass: 1.5
water: 1.33
plastic: depends on the plastic, but about 1.5
air: 1
Light travels fastest in air - and it moves at almost 300,000 km/s (it's a tiny bit slower in air than it is in a vacuum).
It is a electromagnetic radiation which do not requires any material medium for their propagation.
The index of refraction is a property of transparent materials - such as glass, water, air, and plastic - materials through which light can pass. When a photon passes through such a material, it interacts with the electrons and slows down in a precise way. The speed of light in every material we've ever observed (or modeled) is always LESS than the speed of light in a vacuum.
We denote the index of refraction by a number n, with n > 1. Water, for example, has an index of refraction of 1.33. The speed of light in that material is c/n - in the case of water, it's (300,000 km/s)/(1.33) = 225,000 km/s. In other words, the larger the index of refraction, the slower light travels through it.
The indices of refraction of the materials you asked about are:
glass: 1.5
water: 1.33
plastic: depends on the plastic, but about 1.5
air: 1
Light travels fastest in air - and it moves at almost 300,000 km/s (it's a tiny bit slower in air than it is in a vacuum).
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