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(A) The concept of 'ether' was proposed as a medium for the propagation of light waves. However,the Michelson-Morley experiment failed to detect the e

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Albert Einstein

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(A) The concept of 'ether' was proposed as a medium for the propagation of light waves. However,the Michelson-Morley experiment failed to detect the existence of ether. Albert Einstein,in his theory of special relativity published in $1905$,discarded the need for an ether medium,stating that the speed of light in a vacuum is constant for all inertial observers,regardless of the motion of the source or the observer.

Which scientist discarded the postulate of ether?

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