Go Back   Physics Help Forum > High School and Pre-University Physics Help > Light and Optics

Light and Optics Light and Optics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Feb 6th 2011, 10:17 PM   #1
ohm
Senior Member
 
Join Date: Mar 2009
Location: Yadupatti Bazar,Sitamarhi
Posts: 137
light

where does light go after emission from its source( or it is absorbed by the particles, then since light is a form of enery, in which form of energy it transformed).
If light is absorbed , then why does light from distance star reach the earth?(does here intensity of light matters?)
__________________
If science solves one problem, it creates ten other problems.
ohm is offline   Reply With Quote
Old Feb 7th 2011, 02:44 AM   #2
Junior Member
 
Join Date: Feb 2011
Posts: 3
The electromagnetic spectrum is made up of different speeds of wavelengths and include ultraviolet and infrared rays. There are several different kinds of electromagnetic waves that move at the speed of light. Many scientists worked to discover the actual speed of light. Mirrors are closely related to lenses, but have reflective surfaces. They have the ability to create real and virtual images. Description here, which I currently can not think of.
Carrol122 is offline   Reply With Quote
Old Feb 7th 2011, 12:48 PM   #3
Forum Admin
 
topsquark's Avatar
 
Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,659
Originally Posted by ohm View Post
where does light go after emission from its source( or it is absorbed by the particles, then since light is a form of energy, in which form of energy it transformed).
If light is absorbed , then why does light from distance star reach the earth?(does here intensity of light matters?)
Light can be thought of as either a wave or a particle (photon.) Let's talk about it using photons.

Light from any source is emitted in all directions. If the light source is in a closed room (no windows) then all of the light that is not absorbed by some other object is absorbed by the walls. All of the light from the lamp is absorbed and (minutely) is heated up.

Light in space does essentially the same thing. If it interacts with nothing (and that is mostly what space is) then it will be unimpeded when it gets to the Earth.

But there is another way it can get here. Sometimes light is absorbed by clouds of gas (usually hydrogen). In this case, though, the gas absorbs the light energy, heating the cloud. When it absorbs enough energy then it starts re-emitting light. So we still get light on Earth from it. (By the way, the walls of your house do the same thing, but it is probably immeasurable.)

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.
topsquark is offline   Reply With Quote
Old Feb 7th 2011, 10:13 PM   #4
ohm
Senior Member
 
Join Date: Mar 2009
Location: Yadupatti Bazar,Sitamarhi
Posts: 137
sorry but one more thing, after absorption light remains light or convert in other form.
__________________
If science solves one problem, it creates ten other problems.
ohm is offline   Reply With Quote
Old Feb 7th 2011, 10:37 PM   #5
Forum Admin
 
topsquark's Avatar
 
Join Date: Apr 2008
Location: On the dance floor, baby!
Posts: 2,659
When light is absorbed it generally turns into heat energy...which is essentially that a molecule or atom vibrates faster. This vibrating object can then easily emit a new photon.

-Dan
__________________
Do not meddle in the affairs of dragons for you are crunchy and taste good with ketchup.

See the forum rules here.
topsquark is offline   Reply With Quote
Old Feb 10th 2011, 09:10 AM   #6
ohm
Senior Member
 
Join Date: Mar 2009
Location: Yadupatti Bazar,Sitamarhi
Posts: 137
sorry, there is some technical problem in my internet connection. That's why i am not responding. Thanx for ur reply.
__________________
If science solves one problem, it creates ten other problems.
ohm is offline   Reply With Quote
Old Aug 5th 2013, 02:35 AM   #7
Junior Member
 
Join Date: Aug 2013
Posts: 1
Light from any source is emitted in all directions. If the light source is in a closed room (no windows) then all of the light that is not absorbed by some other object is absorbed by the walls. All of the light from the lamp is absorbed and (minutely) is heated up.
__________________
health
video
song
article
Technology
jonnblaze is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Light and Optics

Tags
light



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
Can light travel faster than the speed of light? kiwiheretic Light and Optics 8 Nov 19th 2018 01:58 AM
Faster-than-light Germanlongstrike General Physics 26 Oct 10th 2013 08:04 AM
More light problems Mr Rayon Light and Optics 1 Jul 19th 2009 11:10 PM
Light problems Mr Rayon Light and Optics 1 Jul 18th 2009 08:16 PM


Facebook Twitter Google+ RSS Feed