A light year is a measure of how far light can travel in one year. It is a phenomenal distance, and is used to describe how far away stars are from us.
Scientist use a light meter to show how light in shining on a surface !
The scientist should use a light microscope.
Scientist can use light to move matter. For example, with directed beams of light, scientist can levitate, trap and grip small materials. The matter has to be surround by light entirely for this to work.
It doesn't work that way. The light-year is not used to measure the speed of light. It works the other way round: First, the speed of light is determined through other methods, then the distance called a light-year is calculated based on that measurements.
Being a scientist I like to use light as light. But light is mainly photons.
A light-year is the distance traveled by light in one year. Note that light moves at a speed of about 300,000 km/second.A light-year is defined to have EXACTLY 9,460,730,472,580,800 meters (or approximately 9.5 quadrillion meters).
Scientists don't measure the distance light travels in one year. They calculate it by measuring the speed of light. The speed is 300,000,000 meters/sec. and can be measured in the laboratory with a rotating mirror apparatus. To get the distance traveled by light in one year you multiply the speed (above) by the number of seconds in a year. The answer will come out in meters and is also called one light year.
Light years is the distance light travels in one year. They do this because other galaxies are too far away to measure in kilometres. The numbers would be too long
to look at cells and germs and smaller creatures.
A light year is the distance that light travels in a year. We use it because it allows us to measure huge distances.
He used a compound light microscope
A light-year is a measure of distance, not of time.