I think it would be the different printings. Older ones usually are solid colors, while the newer ones I have seen are brown with some patterning on them. The colors denote who they are given to: brown is for personal witnessing, red is for 5th grade, green for college students, orange for sidewalks off school property, blue for service, white for nursing and medical employees, camo for armed services either green or brown camo. It helps in ordering for the different distributions.
military- black universities- orange schools- red hospitals- white brown
frequencies
Enough.
Refraction is when light bends through an object. White light is made up of all the colors of the spectrum. Different colors have different wavelengths, therefore they bend at different angles. So when white light passes through a prism the different colors bend at different angles, so they separate to produce the rainbow of light that we see.
there are many colors
military- black universities- orange schools- red hospitals- white brown
There different colors emitted
no, current did not have different colors
Colors enter the world by the sun. The rays are made of different colors but they have different tempetures so when they enter the world, they have different colors for different things.
Different impurities give it different colors.
they are in my moms asss(: they are different colors(:
There are different minerals in different crystals which make them different colors. And "imperities"
Different Colors Of Light Travel At Different Speeds.
different wavelengths from different colours
varying speeds different colors of light travel
frequencies
No. But the cases for it come in different colors.