There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers, and find out why they look ...

The universe is full of phenomena that have seemed unexplainable to human beings, but only until science had an answer for it ...

The problem was that of a "black body," something that absorbs all frequencies (or wavelengths) of light. When heated it should then radiate all frequencies of light equally -- theoretically.

If white light is shone on an orange filter, only the orange wavelengths will be observed by the human eye. An object appears to be black if it absorbs all the wavelengths of visible light.