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Physical Chemistry

Blazing goIITian

Joined:	11 May 2010
Post:	388

22 May 2010 19:14:53 IST

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487

on uncertainity principle

None

delta y delta p_x = 0 ........... can this be true depending on the mass of the particle ( i.e for a massless particle ) ?

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siDDhESwaR MuKhErjEE

Blazing goIITian

Joined: 15 Nov 2009

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22 May 2010 19:15:43 IST

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????

sahell... jipmer 5

Blazing goIITian

Joined: 20 Mar 2010

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22 May 2010 22:40:58 IST

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Is there such a thing as a massless particle? neway this is teh uncertainty and there's probly still uncertainty but not sure

Deepak Aggarwal

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23 May 2010 15:19:07 IST

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UNCERTAINTY PRINCIPLE

In quantum mechanics, the Heisenberg uncertainty principle states that certain pairs of physical properties, like position and momentum, cannot simultaneously be known to arbitrary precision.

(delta x) . (delta p) > h / 4 pi

or, (delta x) . (m) (delta v) > h / 4 pi

or, (delta x) . (delta v) > h / 4 m pi

So, for a massless particle, say photon, m = 0

So, (delta x) . (delta v) > infinity

@sahell, photon is massless.

@canorous i hope you have got the point.

Nudge me if you still have any doubt regarding this.

ankurkumar

Hot goIITian

Joined: 12 Jan 2010

Posts: 108

24 May 2010 07:02:34 IST

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but we claculate mass of photon dont we by de brogale equation

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