Question

The number of microns in 1 meter is:
A) $10$
B) ${10^3}$
C) ${10^6}$
D) ${10^9}$

Answer 1

Hint: Length is a measure of the distance a body travels or the size of the object. We need to use the conversion of 1 meter to micrometers, this amount will be the number of micrometers in 1 meter.

Complete answer:
We know that the relation between 1 meter and 1 micrometer is given as
$1\,m = {10^6}\,\mu m$
Since a micron is equal to the length of a micrometer, there are ${10^6}$ microns in 1 meter which corresponds to option (C).

Additional Information:
A micron is a small unit of measurement that measures length. It is another name for "micrometer," which is one-millionth of a meter. The unit of microns is used in many fields, such as biology (e.g., to measure cell size) and chemical engineering (e.g., to measure large particle size) or to measure the core of optical fiber cables. The wavelengths of infrared radiation are also given in micrometers. A human hair is roughly 50 micrometers wide. They are also used in computing to measure the size of elements within integrated circuits and other components. However, for even smaller objects like a transistor or a bacterium, we need to measure their size in nanometres which is one billionth of a meter of one-thousandth of a micron.
The relation of the meter with different units is given as
1 centimetre (cm) = 0.01 m
1 millimetre (mm) = 0.001 m
1 micrometre (μm) = ${10^{ - 6}}$m
1 nanometre (nm) = ${10^{ - 9}}\,$m.

Note:
To solve such questions, we must memorize the relations between different units of length. The micron is just another word for a micrometer of length and we should realize to directly utilize the relation with a meter and a micrometer to count the number of microns in 1 meter.