Correct Answer - Option 2 : 10
-4 cm
The correct answer is option 2) i.e. 10-4 cm.
CONCEPT:
-
Metric prefix: A metric prefix is a unit prefix placed before a basic unit of measurement. It represents the multiple of the unit in a convenient way.
A few common metric prefixes used are as below:
| Metric Prefix |
Symbol |
Value |
| peta |
P |
1015
|
| tera |
T |
1012
|
| giga |
G |
109
|
| mega |
M |
106
|
| kilo |
k |
103
|
| hecto |
h |
102
|
| deka |
da |
101
|
| deci |
d |
10-1
|
| centi |
c |
10-2
|
| milli |
m |
10-3
|
| micro |
μ |
10-6
|
| nano |
n |
10-9
|
| Angstrom |
Å |
10-10
|
| pico |
p |
10-12
|
EXPLANATION:
One micron length = 1 micrometre = 1 μm = 1 × 10-6 m
We know,
1 m → 100 cm
∴ 1 × 10-6 m → \(\frac{100\: cm}{1\:m}\) × 10-6 m = 10-4 cm
