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X-Ray കണ്ടുപിടിച്ച ശാസ്ത്രജ്ഞൻ ആര് ?
A
എഡിസൺ
B
ഫാരഡെ
C
റോണ്ട്ജൻ
D
ലാവോയ്സിയെ
Answer:
C. റോണ്ട്ജൻ
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The operation by square of j vector operates on a vector rotates it through an angle
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