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A quantum of light comes from a star to your eye without any energy loss whatsoever.
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fitz
Jan 22, 2012, 11:09:12 PM1/22/12
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A quantum of light comes from a star to your eye without any energy
loss whatsoever.
Yet light energy from that same star decreases inversely proportional
to the square of the distance.
Which is it?
http://www.amperefitz.com/abstract.htm
loss whatsoever.
Yet light energy from that same star decreases inversely proportional
to the square of the distance.
Which is it?
http://www.amperefitz.com/abstract.htm
Peter Peczulis
Jan 24, 2012, 8:33:38 PM1/24/12
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linked, but I remember from my high-school physics class that as light
travels through space, it can either be stretched or compressed (blue
or red shifting or something like that), as the space in which it
travels changes. This shifting would cause light to change spectrum in
some cases to those which we cannot see (such as UV or IR), So on that
logic, I would agree with the first one, because as the light travels,
it isn't losing any energy.
Thomas Bartscher
Jan 25, 2012, 7:53:38 AM1/25/12
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Both are correct. The first relates to the energy of one quantum, the second relates to the amount of energy that reaches a certain area dependent on distance to the light source.
sdp...@gmail.com
Jan 26, 2012, 2:00:40 PM1/26/12
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Each light unit retains its energy. Lets say a star emits 100 (easy
nember for an example) per second. Each second those 100 are further
from the star. Assuming equal distribution in direction, they form a
shell of those 100 units around the star which expands with time. As
the surface area of the sphere increases each second, the number of
units stays the same. Therefore, the shell constantly has the same
energy (100 units), but they are spread over a larger area.
So if we have a line from my eye to the star, the place where this
line crosses each of these shells would create a point on that shell.
The number of units traveling through this point is less as we get
further from the shell (tiny angle differences between unit paths
become more distinct with distance). So even though each unit has the
same energy, there are less of those units hitting my eye as I get
further from the star, resulting in less cumulative energy.
nember for an example) per second. Each second those 100 are further
from the star. Assuming equal distribution in direction, they form a
shell of those 100 units around the star which expands with time. As
the surface area of the sphere increases each second, the number of
units stays the same. Therefore, the shell constantly has the same
energy (100 units), but they are spread over a larger area.
So if we have a line from my eye to the star, the place where this
line crosses each of these shells would create a point on that shell.
The number of units traveling through this point is less as we get
further from the shell (tiny angle differences between unit paths
become more distinct with distance). So even though each unit has the
same energy, there are less of those units hitting my eye as I get
further from the star, resulting in less cumulative energy.
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