$CATEGORY: Science - Khan Academy/10.Light-Reflection and Refraction/10.Light-Reflection and Refraction--Refraction Of Light

//Multiple Choice

The refractive index of a medium is a measure of how much the speed of light is
{
~ Increased
= Decreased
~ Remains the same
~ Changes direction
}

Absolute refractive index refers to the refractive index of a medium with respect to
{
~ Water
~ Glass
~ Air
= Vacuum
}

The refractive index of air is approximately
{
~ 0
= 1
~ 1.5
~ 2
}

Which of the following is the speed of light in a vacuum?
{
~ \(3×10^5 m/s\)
= \(3×10^8 m/s\)
~ \(3×10^6 m/s\)
~ \(3×10^9 m/s\)
}

What is the formula for refractive index?
{
~ n \= v / c
= n \= c / v
~ n \= f / λ
~ n \= λ / f
}

//True or False

The speed of light is the same in all mediums.{F}

The refractive index of air is very close to 1.{T}

The refractive index depends on the wavelength of light. {T}

A higher refractive index indicates a slower speed of light in that medium. {T}

The refractive index of a vacuum is 1. {T}

//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Absolute refractive index -> Ratio of the speed of light in a vacuum to the speed of light in a medium
=Relative refractive index -> Comparison of the refractive index between two media
=Speed of light in vacuum -> 3×10^8 m/s
=Refractive index formula -> n \= c / v
=Optical medium -> Substance through which light travels
}


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