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Sugeerthaa Reddy from SRI AKILANDESHWARI VIDYALAYA, asked a question
Subject: Science , asked on 14/9/09

State the Principle of reversibility of light

Daffodils From Gulf Model School, added an answer, on 14/9/09
16 helpful votes in Science

 The principle that if a beam of light is reflected back on itself, it will traverse the same path or paths as it did before reversal.
 

The principle of reversibility states that light will follow exactly the same path if its direction of travel is reversed.

Hence:

Using Snell 's Law,

sin i
sin r

= 1 n 2

sin r
sin i

= 2 n 1

1 n 2=

1
2 n 1

It follows that

1 n 2=

1
2 n 1

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Daffodils From Gulf Model School, added an answer, on 14/9/09
16 helpful votes in Science

  Sorry  , 

Using Snell 's Law,

sin i
sin r

= 1 n 2

sin r
sin i

= 2 n 1

1 n 2=

1
2 n 1

It follows that

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100% users found this answer helpful.
masoom786raza9... , added an answer, on 24/3/11
2 helpful votes in Science

when light strikes any reflecting surface, then it goes in the same medium . if mirror is placed at right angle to the reflected ray then it returns in the same path from where it incident without any deviation

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abhinandan_gupta39 , added an answer, on 27/3/11
1 helpful votes in Science

we can prove this by a expiriment using a glass salb

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Daffodils From Gulf Model School, added an answer, on 14/9/09
16 helpful votes in Science

1 n 2=

1
2 n 1

this is the final equation.Sorry again

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Sambit Kumar From Delhi Public School, added an answer, on 13/3/13
1 helpful votes in Science

when light strikes any reflecting surface, then it goes in the same medium . if mirror is placed at right angle to the reflected ray then it returns in the same path from where it incident without any deviation 

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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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Yashwanth Thumu From Vignan Bo Tree School, added an answer, on 3/12/14
The principle that if a beam of light is reflected back on itself, it will transverse the same path or paths as it did before reversal.
The principal of reversibility states that light will follow exactly the same path if its direction of travel is reversed.
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Sumanth From Bharatiya Vidya Bhavans Sri Venkateswara Vidyalaya , added an answer, on 1/3/16
4 helpful votes in Science
Refractive index for light going from medium 1 to medium 2 is equal to the reciprocal of refractive index for light going from medium 2 to medium 1
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Pragya Chakraborty From Sri Krishna Mission School, added an answer, on 23/2/15
if the mirror placed in front of the light is spherical?
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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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Aravind Skipper From Ongc Public School, added an answer, on 13/3/13

The answer is : We know that "ANGLE i = ANGLE e"  & "ANGLE R1 = ANGLE R2". As External & internal Angles r equal. The lines are Parallel

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Aravind Nair From St. Mary's Residential Public School, Thiruvalla, added an answer, on 25/3/11

show that incident ray of light is parallel to the emergent ray of light when light falls obliquely on a side of a rectangular glass slab

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dipenaariwala... , added an answer, on 23/3/11

 how

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hradayanarayan... , added an answer, on 25/3/11

i don 't know

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Manish From Kendriya Vidyalaya No.1, added an answer, on 21/2/13

since the opposite faces or refracting surfaces are parallel incident ray and emergent ray are ll

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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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Peyush Ramachandran From Kendriya Vidyalaya, added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

http:// www. meritnation. com/ ask - answer / question / plzz - explain - principle - of - reversibility - of - light/ ray -optics - and - optical - instruments / 1680674

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