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```
The speed of light in vacuum is 3*100000000. How many nano second does it taketo travel one meter in vacuum

```
3 years ago

Arun
25768 Points
```							In 1 sec light travels 3 *10^8 metresThat means 3* 10^8 m = 1 secHence 1 m = 1/3*10^8 sec = 0.33 *10^-8= 3.33 * 10^-9 sec= 3.33 nanosec
```
3 years ago
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