Color

Color (American English) or colour (Commonwealth English) is the visual perceptual property corresponding in humans to the categories called red, blue, yellow, etc. Color derives from the spectrum of light (distribution of light power versus wavelength) interacting in the eye with the spectral sensitivities of the light receptors. Color categories and physical specifications of color are also associated with objects or materials based on their physical properties such as light absorption, reflection, or emission spectra. By defining a color space colors can be identified numerically by their coordinates.

Because perception of color stems from the varying spectral sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined and quantified by the degree to which they stimulate these cells. These physical or physiological quantifications of color, however, do not fully explain the psychophysical perception of color appearance.

The science of color is sometimes called chromatics, colorimetry, or simply color science. It includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range (that is, what we commonly refer to simply as light).

Needle drop (audio)

A needle drop is a version of a music album that has been transferred from a vinyl record to digital audio or other formats. Needle drops are sometimes traded among music collectors, especially when the original vinyl recording has not been released officially on a subsequent consumer format. It is also referred to as a 'Vinyl Rip' or 'Record Rip'

Other reasons for trading needle drops include the lack of availability of certain recordings on digital media, the non-availability of less compressed versions in digital form, or the lack of availability of certain versions or mixes of that record, e.g. mono or stereo versions, or the loss of the master tape. The term is thought to have been coined in 1949 by Peter Goldmark during the first rush of transfers of lacquer and 78 RPM records to the then-new long playing 33 ⅓ RPM format.

See also

References

1977

1977 (MCMLXXVII) was a common year starting on Saturday (dominical letter B) of the Gregorian calendar, the 1977th year of the Common Era (CE) and Anno Domini (AD) designations, the 977th year of the 2nd millennium, the 77th year of the 20th century, and the 8th year of the 1970s decade.

Events

January