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

General Physics

New kid on the Block

Joined:	20 Jun 2011
Post:	11

5 Feb 2012 22:05:59 IST

7 People liked this

487

is blue hoter than red if yes than why??

Physics

is blue hoter than red if yes than why??

Share this article on:

Comments (14)

shivansh shrivastava

Hot goIITian

Joined: 19 Jan 2012

Posts: 191

5 Feb 2012 22:59:21 IST

Like 0 people liked this

For particls,one with largr wavlngth poses lesser energy. . . .els i dnt knw

shivansh shrivastava

Hot goIITian

Joined: 19 Jan 2012

Posts: 191

5 Feb 2012 23:05:32 IST

Like 0 people liked this

Or use energy=hc/lambda . . .

nageen

Hot goIITian

Joined: 27 Dec 2011

Posts: 116

6 Feb 2012 10:32:58 IST

Like 5 people liked this

if u r talking abt blue light and red light we cant speak abt hotness bcoz temperature is bulk property of molecules...if u r heating a body,the body emmiting blue radiation is hotter than a body emitting red radiation...we can tell this using WEINS DISPLACEMENT LAW which says the temperature of a body is inversely proportional to the wavelength of radiation emitted

meenal vaghela

New kid on the Block

Joined: 20 Jun 2011

Posts: 11

6 Feb 2012 19:29:40 IST

Like 0 people liked this

thanxxx.................

meenal vaghela

New kid on the Block

Joined: 20 Jun 2011

Posts: 11

6 Feb 2012 19:32:09 IST

Like 0 people liked this

is there any another colour of light which is more hotter than blue ?

Vishal U. Karve

Hot goIITian

Joined: 18 Jan 2012

Posts: 147

6 Feb 2012 19:46:09 IST

Like 0 people liked this

Violet will be hotter than blue.

meenal vaghela

New kid on the Block

Joined: 20 Jun 2011

Posts: 11

8 Feb 2012 11:17:29 IST

Like 0 people liked this

okzz.......thanks..

prabhat

New kid on the Block

Joined: 8 Feb 2012

Posts: 1

8 Feb 2012 12:17:11 IST

Like 0 people liked this

blue have lower wavelength than red, but we it is knowthat lesser the wavelength heigher the energy so,

Pawan B Joshi

Cool goIITian

Joined: 23 Dec 2011

Posts: 52

8 Feb 2012 22:02:10 IST

Like 3 people liked this

Why do the hottest bodies appear white..?

meenal vaghela

New kid on the Block

Joined: 20 Jun 2011

Posts: 11

9 Feb 2012 22:23:29 IST

Like 0 people liked this

just because it emmits all wave length.

edison

Forum Expert

Joined: 19 Oct 2006

Posts: 7537

13 Feb 2012 17:28:11 IST

Like 0 people liked this

Bodies at all temperatures has an emission spectrum called as black body radiation. As the temperature of the body increases the maxima of spectrum shifts towards lower wavelength or higher frequency. Therefore blue emitting black bodies are hotter than those emitting red.

Abhijith.s.v

New kid on the Block

Joined: 11 Feb 2012

Posts: 8

15 Feb 2012 07:20:52 IST

Like 0 people liked this

We can use wein's displacement law since wavelength is inversly proportional to temperature.blue is hotter than red

sidharthsekharsahoo

Cool goIITian

Joined: 9 Jan 2012

Posts: 90

15 Feb 2012 17:46:07 IST

Like 0 people liked this

one qsn ,from the above discussion,i understood that the body which is more hotter radiates high frequency radiation enegy .Then is the blake hole warmer or colder?

Vishal Mahuli

Hot goIITian

Joined: 14 Feb 2012

Posts: 188

16 Feb 2012 14:47:19 IST

Like 0 people liked this

blue is hotter than red.. yes.. becozz its wavelength is less..n hence has more energy then red... useing E=hc/lambda u can prove it..... we even have a practical proof for this fact... the star BETELGUESE which is blue in color is much more times hotter then SUN of RED GIANT STAGE... which is red in color.. same phenomenon...

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