Home » Ask & Discuss » Physics. » Modern Physics « Back to Discussion

Modern Physics

Hot goIITian

Joined:	27 Dec 2011
Post:	116

1 Feb 2012 15:49:49 IST

1 People liked this

372

light

Physics

which of he following two statements is correct...

a)two photons having same wavelength have same momentum.

b)two photons having same momentum have same wavelength.

Share this article on:

Comments (5)

shivansh shrivastava

Hot goIITian

Joined: 19 Jan 2012

Posts: 191

1 Feb 2012 21:52:18 IST

Like 1 people liked this

Ph0t0ns r light particles(c0nstant energy packets) havin c0nstant m0mentum n wavelength

Pawan B Joshi

Cool goIITian

Joined: 23 Dec 2011

Posts: 52

1 Feb 2012 22:35:52 IST

Like 0 people liked this

Momentum of all photons , p=mc. There is no question of different momenta for two photons, is there? They only differ in freq n wavelength.

MIHIR K CHHAYA

New kid on the Block

Joined: 30 Jan 2012

Posts: 22

2 Feb 2012 15:02:46 IST

Like 0 people liked this

No, pawan, all photons don`t have same momenta as according to De Broglie relationship, momentum is plank`s const. divided by wave length...both the statements are true.

nageen

Hot goIITian

Joined: 27 Dec 2011

Posts: 116

11 Feb 2012 18:23:43 IST

Like 0 people liked this

Gotcha Momentum is a vector quantity. Like two photons having same wavelength but travel in opposite direction have opposite signs for momenta

Krishna Gopal Singh

Forum Expert

Joined: 29 Dec 2006

Posts: 5153

28 Apr 2012 03:33:55 IST

Like 0 people liked this

(a) is false as two photons with same wavelength will have same magnitude of momentum but there mometa might be different. (b) is true.

Quick Reply

Reply

	Some HTML allowed.
	Keep your comments above the belt or risk having them deleted.
	Signup for a avatar to have your pictures show up by your comment
	If Members see a thread that violates the Posting Rules, bring it to the attention of the Moderator Team