HARDMCQ SINGLEJEE Mains ChemistryPhysical ChemistryAtomic StructureIntro
How long would it take a radiowave of frequency 6 × 10³ s⁻¹ to travel from Mars to Earth, a distance of 8 × 10⁷ km?
0.266 sec
1.246 sec
2.280 sec
3.None of these
Explanation
Time = distance/speed = (8 × 10⁷ km × 10³ m/km) / (3 × 10⁸ m/s) = 8 × 10¹⁰ / 3 × 10⁸ = 266.7 s ≈ 266 s
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