I have got another statements said that "Dark was also not there. Dark is a state where there is no light. Light we can study, but not darkness. We can use Newton's prism to break light into several colors and study the various wavelengths of each color. But you can not measure the dark. How dark a room is measured by how much light intensity in the room is. Dark words are used by humans to describe the absence of light. "
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The 'dark' in dark matter has nothing to do with colors. It is just a name, and the explication stems from the fact dark matter does not interact electromagnetically. I insist: this is the 'dark' in 'dark matter' and not the 'dark' as used in everyday's life.
Yes...that is great explaination..thanks