Photons of light have zero mass problem

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Reference no: EM13560636

1. Two identical clocks are synchronized. One is then put inorbit directed eastward around the Earth while the other remains onthe Earth. Which clock runs slower? When the moving clock returnsto the Earth, are the two still synchronized?

2. Photons of light have zero mass. How is it possible that theyhave momentum?

Reference no: EM13560636

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