Visible light is a small part of the electromagnetic spectrum that is visible to the human eye. Isaac Newton discovered the visible light spectrum in the 17th century using prisms to break white light into its constituent colors. Visible light comes from sources like the sun, light bulbs, screens, and fireworks. It is important for vision and is used in lasers for applications like surgery. While mostly harmless, intense visible light can damage eyes.

1. VISIBLE LIGHT

2. WHAT IS VISIBLE LIGHT?
•The Visible Light Spectrum is a very
small part of the Electromagnetic
Spectrum that is visible to the human
eye. The electromagnetic radiation in
this wave is known as visible light or
light

3. DISCOVERYOF VISIBLELIGHT
•Spectrum was discovered
by Isaac Newton in the
17th century,. the truth
behind white light using
prisms – triangular bars
of glass – to break the
light into all of its
different colors and then
reassemble them again.

4. Although there is
further knowledge
that it had been
discovered four
centuries earlier in
the 13th century by
Roger Bacon.

5. USESOF VISIBLELIGHTS
Visible light is the range of electromagnetic waves that
humans can see. Anything that glows or gives off light
makes waves of what we call visible light. The sun,
light bulbs, candles and fire are all things that people
automatically think of when it comes to light, but
visible light comes from many sources and in many
colors. Some other sources of visible light include:
television and computer screens, glow sticks, and
fireworks.

6. Advantages of Visible Lights
•Visible light is extremely important to humans, we use
it TO SEE!
•Without light, our eyes would not be able to see
images of anything.
• We concentrate visible light to make lasers to use in
everything from surgery, to CD players to laser
pointers.
•Visible light waves also make our TV, computer and
cell phone screens work.

7. •Visible light is typically pretty harmless.
•However, some light can be so intense that
it can damage the receptor cells in your eye
causing temporary or permanent blindness.
•High powered lasers can also be damaging
and will cause burns.
Dis-Advantages of Visible Lights

8. MORE ABOUT VISIBLE LIGHTS

11. A prism can break
white light up into
the visible light
spectrum. You can
also use your pen to
break light spectrum.
https://www.livescience.com/50678-visible-
light.html

12. •Visible light, which
travels at a dizzying
186,282 miles per
second through space,
is just one part of
light's broad
spectrum, which
encompasses all
electromagnetic
radiation. https://sciencing.com/visible-light-waves-8592114.html

13. The Light Spectrum
•White light and all the colors of the rainbow
represent a small part of the electromagnetic
spectrum, but they are the only forms of light
we can see because of their wavelengths.
Humans can only detect wavelengths between
380 and 700 nanometers. Violet has the
shortest wavelength we can see, while red has
the largest

14. Light Color and Energy
•Light color is usually determined by the energy
being produced by the source that emits it. The
hotter an object is, the more energy it radiates,
resulting in light with shorter wavelengths.
Cooler objects create light with longer
wavelengths. For example, if you fire up a
blowtorch, you will find its flame is red at first,
but as you turn it up, the color becomes blue.

15. Colors of the star
Similarly, stars emit different colors of light
because of their temperatures. The surface
of the sun has a temperature around 5,500
degrees Celsius, causing it to emit a
yellowish light. A star with a cooler
temperature of 3,000 C, like Betelgeuse,
emits red light. Hotter stars like Rigel, with
a surface temperature of 12,000 C, emit blue
light.

17. Don’t judge
people by its
appearance