Ultraviolet Light: Demos & Experiments Video is organized into several sections, including Absorbing UV Light, Fluorescence and
Ultraviolet Light, Three Colors of Ultraviolet Light (UV-A, UV-B, and UV-C), The Discovery of UV Light, the Mercury Spectrum, and Phosphorescence.
Through
this video, you will learn about UV (ultraviolet) light, and it might save your
life. Why? Ultraviolet light is more energetic than regular light—we sometimes
call it “ionizing radiation” because
it has the power to ionize the electrons in molecules, like DNA, and cause
damage. In the video, surely you will be interested to see an original sunblock
demo!
Absorbing UV
Light
UV
light is invisible to us, but its energy can make other objects glow. You will
see white socks glowing under UV light, but it is actually the detergent
residue that glows, not the socks themselves.
It
doesn’t always take UV light to make things glow. These liquids [below] will glow
under a blue light, but not all will glow under a red light.
Blue and violet lights are different from other colors, because they are
more energetic, higher in frequency. Their higher frequency light is absorbed
and re-emited as lower energy light.
These
plastic beads are sensitive to ultraviolet light, and below you will see them
glowing and colorful and UV light and in sunlight.
However,
you will see that under a pane of window glass [below], the beads no longer change color.
Flowers Transformed--Through an Insect's Eyes
The
video is almost ten minutes long which makes it a double video, power-packed
with information. You will want to pause and re-watch segments and demos.
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