hi in this video we're continuing story
about photon before we start if you want
to get whole picture watch our previous
video about sun in light year photon is
elementary particle he's like
transportation vehicle for
electromagnetic forces like all
elementary particles photons are best
explained by quantum mechanics because
they exhibit wave particle duality
considering that photos don't have mass
they will almost always move with
maximum speed in the universe that is
equal to the speed of light 299 792 KM/S
kilometers per second in this video we
are talking about the light that is only
visible for human eye sight in
electromagnetic spectrum the visible
part of spectrum for us and the most
animals is placed between 380 and 760
nanometers of wavelength in this length
you can find all seven colors from which
human eye can make up to 10 billions of
different shades and because evolution
didn't provide us with organs to detect
other wavelengths we are trying to fill
that deficiency with machines that can
see for us human inventions help us
learn about our environment in our place
in universe in which we live I hope you
heard something new in my video and you
can now share this knowledge with your
friends and family by sharing the video
on your social media and that way you
will help us in making more science
videos like this thank you for a time
you
