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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
Answered on 14/9/09

 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

View More 18 Answer
Daffodils , From Gulf Model School , added an answer
Answered on 14/9/09

  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

Daffodils , From Gulf Model School , added an answer
Answered on 14/9/09

1 n 2=

1
2 n 1

this is the final equation.Sorry again

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

 how

masoom786raza9... , added an answer
Answered 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

Aravind Nair , From St. Mary's Residential Public School, Thiruvalla , added an answer
Answered 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

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

i don 't know

abhinandan_gupta39 , added an answer
Answered on 27/3/11

we can prove this by a expiriment using a glass salb

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

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

Aravind Skipper , From Ongc Public School , added an answer
Answered 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

Sambit Kumar , From Delhi Public School , added an answer
Answered 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 

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Peyush Ramachandran , From Kendriya Vidyalaya , added an answer
Answered on 18/3/14

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

Yashwanth Thumu , From Vignan Bo Tree School , added an answer
Answered 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.
Pragya Chakraborty , From Sri Krishna Mission School , added an answer
Answered on 23/2/15
if the mirror placed in front of the light is spherical?

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