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Sugeerthaa Reddy , asked a question
Subject: Science , asked on 14/9/09

State the Principle of reversibility of light

Daffodils , added an answer, on 14/9/09
22 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 , added an answer, on 14/9/09
22 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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83% users found this answer helpful.
Daffodils , added an answer, on 14/9/09
22 helpful votes in Science

1 n 2=

1
2 n 1

this is the final equation.Sorry again

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Peyush Ramachandran , 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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abhinandan_gupta39 , added an answer, on 27/3/11

we can prove this by a expiriment using a glass salb

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Sambit Kumar , added an answer, on 13/3/13

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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masoom786raza9... , added an answer, on 24/3/11

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 , 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 , added an answer, on 3/12/14
1 unhelpful votes in Science
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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Pragya Chakraborty , added an answer, on 23/2/15
1 unhelpful votes in Science
if the mirror placed in front of the light is spherical?
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Sumanth , 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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Bj Singh , added an answer, 2 weeks, 1 day ago
16 unhelpful votes in Science
snells law also stated that this world is filled with idiots
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dipenaariwala... , added an answer, on 23/3/11
1 unhelpful votes in Science

 how

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Aravind Nair , added an answer, on 25/3/11
1 unhelpful votes in Science

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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Peyush Ramachandran , 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 , 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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Manish , added an answer, on 21/2/13
2 unhelpful votes in Science

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

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Aravind Skipper , added an answer, on 13/3/13
2 unhelpful votes in Science

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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Ansar Ahmad Sheikh , added an answer, 3 weeks, 6 days ago
2 unhelpful votes in Science
When light pass rarer to denser medium it refract towards normal and when light pass denser to rarer medium it refract away from the normal
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Peyush Ramachandran , 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 , added an answer, on 18/3/14
65 helpful votes in Science

Please refer to the following link -

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hradayanarayan... , added an answer, on 25/3/11
4 unhelpful votes in Science

i don't know

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