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If the speed of light is 3.0 × 108 ms-1 ,calculate the distance covered by light in 2.00ns. 

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Distance covered = speed ×time 

=3.0 × 108 m s-1 ×2.00 ns 

=3.0 × 108 m s-1 × 2.00 ns × 10-9 s/1ns 

=0.600 m

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