Positive rays were discovered by

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(B) Positive rays,also known as canal rays,were discovered by $E. Goldstein$ in $1886$ using a discharge tube with a perforated cathode.However,the de

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Goldstein

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(B) Positive rays,also known as canal rays,were discovered by $E. Goldstein$ in $1886$ using a discharge tube with a perforated cathode.However,the detailed study and identification of these rays as positively charged particles (ions) were later performed by $J.J. Thomson$.In the context of standard physics curriculum questions,$E. Goldstein$ is credited with the discovery of canal rays (positive rays).

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