Community > Forum > Technology & Science > The light has mass and weight......

The light has mass and weight......

Posted by: JamesHughes - Fri Jul 29, 2011 7:40 am
Post new topic Reply to topic
 [ 17 posts ] 
The light has mass and weight...... 
Author Message
Space Walker
Space Walker
User avatar
Joined: Wed Jan 11, 2012 10:19 pm
Posts: 189
Location: Outside Wonko the Sane's house.
Post Re: The light has mass and weight......   Posted on: Wed Jan 11, 2012 10:47 pm
Just re-iterating here, Light has no mass, because it isn't matter, it's energy. It has momentum because it's moving at the universal speed limit, which requires infinite energy to accellerate up to with mass. It's there in the relativity equations, but I'm incapable of putting it in layman's terms. Suffice it to say, light exerts pressure on a surface through reflection, or absorption, depending on how shiny it is, and usually both. (You can't have a perfect reflector, or absorber.) Reflection is more efficient, because it reverses the momentum, and absorption wastes a lot of energy as heat.

_________________
"You can't have everything, where would you put it?" -Steven Wright.


Back to top
Profile
Space Walker
Space Walker
User avatar
Joined: Wed Jan 11, 2012 10:19 pm
Posts: 189
Location: Outside Wonko the Sane's house.
Post Re: The light has mass and weight......   Posted on: Wed Jan 11, 2012 10:52 pm
The Earth has enough mass to bend light, it's just not by an amount we can perceive with our natural senses. It also has enouh gravity to slow time, again by an imperceptible amount, not to mention the fact that the majority of us never leave, so it's the time we're used to.

_________________
"You can't have everything, where would you put it?" -Steven Wright.


Back to top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ] 
 

Who is online 

Users browsing this forum: No registered users and 14 guests


cron
© 2014 The International Space Fellowship, developed by Gabitasoft Interactive. All Rights Reserved.  Privacy Policy | Terms of Use