What do we mean by minus energy ?

  • Thread starter blue bloom
  • Start date
what do we mean by"minus" energy ??

in the classic physics the minus energy express the gain or loss of the particle ..but when we substitute in the quantum theory lows ,the electron has a minus energy ..I think the energy is not like the charge to be minus ..& I can not also imagine any particle even a small one have a minus energy ..!!!!
 
1,159
0
Re: what do we mean by"minus" energy ??

Right, all particles in QM have plus energy.
 
1,341
3
Re: what do we mean by"minus" energy ??

It just depends on how you define potential energy...
 
525
6
Re: what do we mean by"minus" energy ??

The energy is taken relative to some state (which is defined to have zero energy -- this sometimes happens implicitly). The reason is that in any particular process you only talk about energy differences anyway.

On top of this: usually the negative energy states refer to bounded states, while positive energy states refer to unbounded states.
 

Vanadium 50

Staff Emeritus
Science Advisor
Education Advisor
23,214
5,546
Re: what do we mean by"minus" energy ??

On top of this: usually the negative energy states refer to bounded states, while positive energy states refer to unbounded states.
Exactly.

Right, all particles in QM have plus energy.
No, xepma has it right.
 
Re: what do we mean by"minus" energy ??

On top of this: usually the negative energy states refer to bounded states, while positive energy states refer to unbounded states.
I think this is the logistic reply ..
I asked a teacher about this ,he told me that if we considered the energy between the electron & the proton equal zero before gravitation ,then the attraction would lead to lose energy & that make the energy of electron always minus (we find that in Bohr's equation)
but I still don't know what are the results of these sign??
 

Related Threads for: What do we mean by minus energy ?

  • Posted
Replies
4
Views
5K
Replies
1
Views
404
  • Posted
Replies
1
Views
1K
Replies
2
Views
479
Replies
1
Views
1K
Replies
2
Views
958
Replies
19
Views
5K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top