Translate:
English
Chinese (S)
Chinese (T)
Croatian
Dutch
French
German
Hebrew
Italian
Japanese
Korean
Portuguese
Russian
Serbian
Spanish
Swedish
Turkish
Additional
visible light
English Wikipedia - The Free Encyclopedia
Download this dictionary
Light
Light
is
electromagnetic radiation
within a certain portion of the
electromagnetic spectrum
. The word usually refers to
visible light
, which is
visible
to the
human eye
and is responsible for the sense of
sight
. Visible light is usually defined as having
wavelengths
in the range of 400–700
nanometres
(nm), or 4.00 × 10
-7
to 7.00 × 10
-7
m, between the
infrared
(with longer wavelengths) and the
ultraviolet
(with shorter wavelengths). This wavelength means a
frequency
range of roughly 430–750
terahertz
(THz).
See more at Wikipedia.org...
Visible spectrum
The
visible spectrum
is the portion of the
electromagnetic spectrum
that is
visible
to the
human eye
.
Electromagnetic radiation
in this range of
wavelengths
is called
visible light
or simply
light
. A typical human eye will respond to wavelengths from about
390 to 700 nm
. In terms of frequency, this corresponds to a band in the vicinity of 430–770
THz
.
See more at Wikipedia.org...
© This article uses material from
Wikipedia
®
and is licensed under the
GNU Free Documentation License
and under the
Creative Commons Attribution-ShareAlike License