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
It allows a scientist to measure the wavelength of light.
The scientist should use a light microscope.
A scientist might use a light meter to measure the intensity of light in a particular environment. This can help them understand how light levels may affect biological processes, growth patterns, or the behavior of organisms.
the scattering of light by colloids is known as tyndall effect. it is named after the scientist who discovered it.
Although there were many scientist who were competing to invent the first practical light bulb, it was Thomas Alva Edison who is credited with making them a household item.
Thomas Young is the scientist who proposed in 1801 that light is a wave, using his double-slit experiment to support this theory.
One famous scientist who investigated light is Isaac Newton. He conducted experiments with prisms to explore the properties of light and developed the theory of colors.
The amount of light is the variable in this experiment. The scientist would manipulate the light levels to observe how it affects earthworm activity.
A scientist might use colored dye to enhance the contrast and make specific structures or features more visible. Dye can help highlight certain parts of a specimen, making it easier to observe and study under a compound light microscope.
Thomas Edison- Light Bulb
benjamin franklin
he invented the light microscope and he was a scientist