## Evaluate the velocity of electron, Physics

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A radioactive atom is moving with respect to the laboratory at a speed of 0.3 c in the x direction. If it emits an electron having a speed of 0.8 c in the rest frame of the atom, Evaluate the velocity of electron with respect to a laboratory observer when :

(I) it is ejected in the y direction

(ii) the electron is ejected in the x direction

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