Question

13. Name the three convenient units used to measure
length ranging from very short to very long value.
How are they related to the S.I. unit?​

Answer 1

Interatomic interatomic distances can be conveniently measured in angstroms.

Intercity distances can be conveniently measured in kilometres.

Interstellar distances can be conveniently measured in light years.

The SI unit for measuring length is metres.

$10 {}^{ - 8 } a = 1m$

1 Km =1000m

one light year is equal to the distance covered by the light in one year

Answer 2

Answer:

1. nanometre: a unit for measuring length in the metric system. There are one billion (=one thousand million) nanometres in a metre.

2. centimetre: a unit for measuring length in the metric system. There are 100 centimetres in one metre.

3. gigametre: a unit for measuring length in the metric system. There are 1 million meter in one gigametre.