Question: In special relativity, light rays in Minkowski space- time M'1 travel along the light cone which, by definition, consists of all null directions associated with

In special relativity, light rays in Minkowski space- time M'1 travel along the light cone which, by definition, consists of all null directions associated with an indefinite quadratic form q(x) = xT Kx. Find and sketch a picture of the light cone when the coefficient matrix K is
a.

Remark: In the physical universe [41 ] , space-time is n = 4-dimensional, and
K = diag(l. - 1. -1, - 1).

3 2 1 0 0 0-1 0 0

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