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I can answer questions regarding Einstein's Theory of Relativity, particularly in Special Relativity. I will not answer homework questions or mathematical problems that require special symbols.

Experience in the area

I have taught physics at the college level, undergraduate and graduate, for many years including Special Relativity. I have taught at Johns Hopkins, Case-Western, and MIT. I have also served as a staff member of the Commission on College Physics, which was supported by the National Science Foundation to recommend improvements in the curriculum of college physics departments in the US. I am also the author of a textbook titled Vector Calculus, which was used at MIT in the teaching of electromagnetic theory and relativity. My research interests were mainly in solid state physics, especially the properties of metals at low temperatures. I am listed in the publication known as American Men of Science.


I have dozens of papers published in the Physical Review and in the American Journal of Physics.


I hold a Ph.D. degree in physics from the Johns Hopkins University.

Past/Present Clients

Johns Hopkins University, Case-Western Reserve University, Massachusetts Institute of Technology, Empire State College, Georgetown University, Commission on College Physics, and UNESCO.

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    K = Knowledgeability    C = Clarity of Response    P = Politeness
Dan05/01/151010You're right I didn't really comprehend your .....
Franco Vivona03/10/15101010Fantastic, Ben! I got it. Thanks so .....
Joan11/29/14101010Dear Uncle Ben, Thanks for your common .....

Recent Answers from Uncle Ben

2016-09-04 Space curvature:

Janko, when you say that an object is standing still, you show that you dont understand that if an object is standing still in one frame of reference, it is moving with respect to another frame of reference

2016-05-17 time:

If two stars are a large distance apart, then an even more distant observer sees a small angular separation, not a small linear separation, because of the distance from him. There is no relativity going

2016-05-15 time:

Praveen, the answer is simpler than you think. Time and space are related by velocity. You can say that two points are so many kilometers apart or by so many hours apart, given a velocity of travel.  

2016-05-15 travel in space:

As you know, light is already much faster than 1000 km/hr.    Maybe you want to know why we cannot travel faster than light. The answer according to relativity is that as we approach light speed, we get

2016-05-04 Speed of light:

Of course we can see light! And relativity correctly predicts it. Why and how are not available to us. That's nature for you and me.     Its colour is different for objects moving with respect to us; that


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