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Units of Time

Velocity of l...

Question

Velocity of light in centimeter per nano second is .....................

A

30000

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B

30

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C

300

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D

0.3

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Solution

The correct option is B 30
The speed of light is $3 \times 10^{8} m / s$

The velocity of light in centimeter per nanosecond is

$= 3 \times 10^{8} \times \frac{100}{10^{- 9}} c m n s^{- 1}$

or $30 c m n s^{- 1}$

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