railway RRB Technician Grade 3 Mock Test 2024 General Science Physics Wave

ನಿರ್ವಾತದಲ್ಲಿ ಬೆಳಕಿನ ವೇಗ:

1

3 × 10 ⁸ ms ^-1

2

2 × 10 ⁸ ms ^-1

3

3 × 10 ⁷ ms ^-1

4

3 × 10 ⁶ ms ^-1

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