Optical drives such as CD or DVD writers store data as described in the question. When these drives write, they use lasers, and the lasers etch into the ink/dye that is located inside the label of the CD or DVD. The laser causes the ink to change colors. The write speed of the medium is determined by the speed at which the ink can change colors. The faster the chemical change takes place, the faster it can be written to.
Optical storage device
MAGNETIC
sun spots
what are the spots on earth main or do the earth have spots what are the spots on earth main or do the earth have spots
yes you can scrub, exfoliate and moisturise your legs to remove dark spots .
Dark spots on the Sun are called sunspots. (You knew that was coming, didn't you?)
The color of their fur is pure white with dark black spots. They can also have a smoky gray or yellowish fur. The spots could be dark gray instead of dark black spots.
they are called flares
Lemon juice is known to lighten skin dark spots.
the dark red spots in panties are the periods (the monthly bleeding from a women's womb)
craters. They look dark because they are shadowed.
Pigmentation spots (dark mole-like spots) may occur especially in chinchillas with the beige gene but this is nothing to worry about.