Light short 2 Flashcards

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1
Q

What is the refractive index of water ?

A

n[w] = 1.33

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2
Q

The refractive index of medium 1 with respect to medium 2 formula is

A

n^12 = speed of light in medium 2/speed of light in medium 1 = v^2/v^1

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3
Q

Relative refractive index formula

A

n^21 = speed of light in medium 1/speed of light in medium 2 = v^1/v^2

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4
Q

Absolute refractive index formula.

A

n[m]= speed of light in air/speed of light in medium = c/v

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5
Q

What is absolute refractive index ?

A

It is the ratio of the velocity of light in vacuum to the velocity of light in the medium.

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6
Q

Light travels fastest in vacuum with speed of

A

3 x 10^8 M s^-1

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7
Q

What is the refractive index

A

The refractive index is a measurement of how much a light ray bends when it passes from one medium to another.

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8
Q

Why does refraction occur ?

A

Refraction is due to change in the speed of light as it enters from one transparent medium to another.

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9
Q

Formula 1

A

1/v + 1/u = 1/f

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10
Q

Formula 2

A

m = Hi/Ho

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11
Q

Formula 3

A

m = Hi/Ho = -v/u

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12
Q

What is [u] ?

A

The distance of the object from its pole is called the object distance (u)

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