1.

The speed of light in air is: (a) 3×108 cm/s (b) 3×108 mm/s (c) 3×108 km/s (d) 3×108 m/s

Answer»

The speed of light in air is: (a) 3×108 cm/s (b) 3×108 mm/s (c) 3×108 km/s (d) 3×108 m/s



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