MCQ
निर्वात में प्रकाश की चाल होती है-
  • A
    $2 \times 10^8 MS ^{-1}$
  • $3 \times 10^8 MS ^{-1}$
  • C
    $3 \times 10^8 CMS ^{-1}$
  • D
    $3 \times 10^{11} MS ^{-1}$

Answer

Correct option: B.
$3 \times 10^8 MS ^{-1}$
B

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