Q. एक्स-रे का आविष्कार किसने किया था ?

(A) हॉपकिंस
(B) रौंटजन
(C) मार्कोनी
(D) मोर्स

✅ Correct Answer: (B) रौंटजन

Published by Neha Sharma ⭐ 7.80K Points at 22-Dec-2021 07:37 am in Physics

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