Ultraviolet light lies just outside the range of visible light our eyes can detect. Its wavelengths are shorter and higher energy than visible light. Even though our eyes can’t directly detect ultraviolet light, we can see its effects

1. V-UV &
UV-Vis
Ir. Sugeng Endarsiwi

2. Artificial sources include:
Tanning booths Black lights Germicidal lamps
Mercury vapor
lamps
Halogen lights
High-intensity
discharge lamps
Fluorescent and
incandescent
sources
Some types of
lasers.
The sun is our primary natural source of UV radiation.
Although UV light can be dangerous, it is also very valuable and is used in
many ways.
Ultraviolet (UV) light is a type of electromagnetic radiation that is all around
us even though our eyes can't detect it. Our bodies use it to make vitamin D,
but too much exposure can cause painful burns and even cancer.

3. • Mercury vapor lamps
(widely used in Printing Industry)

4. • UV lamps, solidify printing inks and coatings by
using high intensity ultraviolet light, instead of
drying, to initiate the needed chemical reaction -
this reaction almost instantly turns inks and
coatings into solids, effectively curing them onto
whatever substrate to which they were applied.
• In commercial printing, high-pressure
mercury-arc lamps / bulbs and similar designs are
used to create the required UV light for the print-
curing process. (Uva, Uvb, Uvc are most used in
Printing Industry.

6. Ultraviolet (UV) light has shorter wavelengths than
visible light.
Although UV waves are invisible to the human eye,
some insects, such as bumblebees, can see them.
This is similar to how a dog can hear the sound of a
whistle just outside the hearing range of humans.
(Sumber: https://science.nasa.gov/ems/10_ultravioletwaves)

7. • Ultraviolet light with wavelengths in the 100–200 nm
range (known as the vacuum ultraviolet; VUV).
• The vacuum-ultraviolet (VUV) region of the
electromagnetic spectrum is situated between the far-
UV and X-ray regions.
• It covers a vast range of photon energy from 6.20 eV
(200 nm) to 41.3 eV (30 nm).

8. What is UV-Vis-NIR?
UV-Vis-NIR refers to ultraviolet, visible, near-infrared.
Ultraviolet-visible (UV-Vis) spectrophotometers use a light source to illuminate a
sample with light across the UV to the visible wavelength range of the
electromagnetic spectrum (typically 190 to 900 nm).
UV-Vis-NIR spectrophotometers have an extended wavelength range, into the near-
infrared (NIR) region (800 to 3,200 nm).
UV-Vis-NIR instruments are used in cutting-edge materials research, including
analysis of solar cells, nanocomposites, optical components, thin films, gels, wafers
and filters, as well as biotech and pharmaceutical applications

9. • Ultraviolet light lies just outside the range of
visible light our eyes can detect. Its wavelengths
are shorter and higher energy than visible light.
Even though our eyes can’t directly detect
ultraviolet light, we can see its effects.
• (Source: https://hubblesite.org/contents/articles/observing-ultraviolet-light)

11. • Source:
• https://zeiss-campus.magnet.fsu.edu/articles/lightsources/mercuryarc.html
• https://www.nature.com/articles/s41566-018-0270-9#