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## Main Question or Discussion Point

Is there any electromagnetic property of photons that make them attract towards each other?

- Thread starter ramanakumars
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- #1

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Is there any electromagnetic property of photons that make them attract towards each other?

- #2

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No.

Why do you think so?

Why do you think so?

- #3

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- #4

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I think the answer is yes, and it is mentioned in Feynman's NZ lectures. I don't think this is what you were thinking of, but it goes like this:

Time is up, space is horizontal, ignore the dots:

A . . B

| . . |

| . . |

| . . |

| . . |

a . . b

The probability that you will get photons at A and B a short time after them being at a and b is calculated using the two events shown. But there is also the possibility of this:

A . . B

. \. /

.. \/

.. /\

. /. \

a . . b

Which is less likely as it involves a larger distance for one thing.

But taking the two together, it comes out that the most likely configuration for A and B is slightly closer together than a and b.

Time is up, space is horizontal, ignore the dots:

A . . B

| . . |

| . . |

| . . |

| . . |

a . . b

The probability that you will get photons at A and B a short time after them being at a and b is calculated using the two events shown. But there is also the possibility of this:

A . . B

. \. /

.. \/

.. /\

. /. \

a . . b

Which is less likely as it involves a larger distance for one thing.

But taking the two together, it comes out that the most likely configuration for A and B is slightly closer together than a and b.

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- #5

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so let me get this straight (am still a high school physics student :P)

The paths

A . . B

| . . |

| . . |

| . . |

| . . |

a . . b

are the paths of normal photons in a stream of light, i.e. side by side. but it is possible to get the second path also? i.e. get path aB and bA? is that what u're saying?

- #6

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Lights **don't** have to move in straight lines, if you don't know.

Light could move in any path in space, but the path which have the highest probability will be observed.

Read this: http://www.scribd.com/doc/7119268/2physics-Qed-Feynman-Qed-the-Strange-Theory-of-Light-and-Matter-Princeton-University-Pre" [Broken] Chapter 1

Light could move in any path in space, but the path which have the highest probability will be observed.

Read this: http://www.scribd.com/doc/7119268/2physics-Qed-Feynman-Qed-the-Strange-Theory-of-Light-and-Matter-Princeton-University-Pre" [Broken] Chapter 1

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Thanks guys... will look through it... i'll probably understand a bit more about this stuff..

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