Question

the order of the magnitude of speed of light in si unit is

a)16 b)8 c)4 d)7

and how ??

Answer 1

option (B).............

Answer 2

In S.I unit, the unit of distance = metre

                 The unit of time = second.

The velocity of light in vacuum or air is c.

     The value of   $c = 3*10^8\ m/s$

We are asked to calculate the order of the magnitude of speed .

The magnitude of any physical quantity can be written in the power of ten as -

                           $p=m*10^n$     [  1≤ m ≤9  and m ∈ Q]

 Here, the power of 10 is 8.

Hence, the order of magnitude of speed is b] 8          [ans]