MEASUREMENT/UNIT

Light year is a unit of astronomical distance equivalent to the distance that light travels in one year,which is 9.46*10^15 meters

Light year is a unit of astronomical distance equivalent to the distance that light travels in one year,which is 9.46*10^15 meters

Light year is a unit of astronomical distance equivalent to the distance that light travels in one year,which is 9.46*10^15 meters

A light year is the distance a beam of light travels in a single earth year.The speed of light is constant in a vacuum.And that is where all the stellar bodies are present in a vacuum.The speed of light is constant throughout the universe and is known to high presion.That is why all astronomical distances are measured in light-year

A parsec is a unit of length used to measure the astronomical large distance of object beyond our solar system.
1 parsec=3.0857*10∧16
1 Light year=9.461*10∧15
so 1 parsec=3.262 light year
only b is close to the exact answer

A parsec is a unit of length used to measure the astronomical large distance of object beyond our solar system.
1 parsec=3.0857*10∧16
1 Light year=9.461*10∧15
so 1 parsec=3.262 light year
only b is close to the exact answer

1 Centimetre=0.39 inch,so we can multiply centimetre by 0.39 to convert it to inches

1 nanometre=10∧-9
1 feet=0.305 metre
1 feet=30.5*10∧7nm
1 feet=6*30.5*10∧7nm=183*10∧7nm

1 Nanometre=1.0*10∧-9m
since 1 metre = 100 cm
so 10∧-9m=10∧2*10∧-9cm=10∧-7cm

Ampere is the SI unit to measure the electric current. If one ampere current is flowing in any conducting device wire,it means 6.25*10∧18 electrons are entering per second from one direction and same amount of current flows from the other end per second.