Recent content by ramcg1

“Let's be specific: a gamma ray is absorbed by a nucleus. The energy and momentum of the gamma ray is transferred to the nucleus, which recoils and also gains some internal energy. The amount of energy lost from the gamma ray is the same as the total energy (internal + energy of motion)...

OK, so it is not invariant, but it still still does not explain why the energy and momentum in one frame of reference is different to the energy and momentum in another frame of reference. If the object (whether a photon or some other kind of object) is in an intermediary position between the...

“You have to take energy and momentum together in order to create a Lorentz invariant propery.” So in one frame of reference it has low energy and low momentum and in the other it has high energy and high momentum, but the velocity is c. Applying the transformation is mathematically...

"The energy of a system depends on the frame of reference used to measure it." Are you implying that by changing the frame of reference you change the total energy of a system? How does tha tconserve energy.

I seemed to have germinated a discussion (worth while of course) in a direction other than what I originally intended. I neglected to mention Special Relativity. I asked this question because I wanted to find out how special relativity handles energy changes under the Relativistic Doppler...

A scientist’s transmitter emits a wavelength of very long wave electromagnetic radiation. We call him One and he watches his wave move through the universe at c. Another scientist, call him Two, approaches One at very nearly c. Two moves directly at One’s wave and nearly dies of fright when...

I currently find myself having a small portion of free time so I wish to extend my rather hasty written earlier reply to Integral’s post. I suppose what I have written seems completely obvious and makes sense to me but not to anyone else. “A frame of reference does not have a "boundary". A...

Pounds is a unit of force Kilogram is a unit of mass Try this hyperlink: http://www.engineering.ucsb.edu/~me15web/top_menu/tables/table_4_unit_conversion.htm

Pervect Your posting was very well written and understandable, thank you for both your reply and your time. It has led me to revisit the Lorentz transformations, SR and the flow on into time dilation, length contraction, relativistic mass transformation and mass-energy equivalence. I...

As your hypothetical being has no concept of thickness, but a concept of change, he is going to believe that time is the third dimension. I did not like your example for the following reasons: An observer in 3D can look down onto the 2D world and perceive 2D shapes. An observer in 2D has...

You have given me a lot of material to consider. I will go away, digest it and get back if I have any futher questions.

I appreciate any response and I thanked you for yours. You are right. I have not been very clear possibly because my original posting contained several questions and I had not thought this one through enough. Perhaps the following makes more sense: Suppose a 100 km length of straight and...

Nice spacetime answer. I am attempting to obtain a clear understanding of the foundations of Spacetime. It is fun to play with mathematics but how can I fully understand the implications of Spacetime if I do not fully understand the foundations that it is built upon. If, within an inertial...

Thanks for the definition, but it does not answer my question.