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Theory of relativity (view source)
Revision as of 17:41, September 9, 2018
, 17:41, September 9, 2018→Mass increase: Better to call it "apparent". The notion that the mass actually increases is obsolete.
This is the same as above with <math>x_2 - x_1</math> and <math>x'_2 - x'_1</math> being the lengths in the undashed and dashed frames respectively. Again, geometrical arguments may be used to achieve the same result.
This is the same as above with <math>x_2 - x_1</math> and <math>x'_2 - x'_1</math> being the lengths in the undashed and dashed frames respectively. Again, geometrical arguments may be used to achieve the same result.
===Mass increase===
===Apparent mass increase===
For decades the theory of relativity taught that as a body moves with increasing velocity its [[mass]] also increases.<ref>For example, this was taught as recently as in the 1991 edition of the Encyclopedia Britannica.</ref>
For decades the theory of relativity taught that as a body moves with increasing velocity its [[mass]] also increases.<ref>For example, this was taught as recently as in the 1991 edition of the Encyclopedia Britannica.</ref>