VISIBLE LIGHT

Does the visible light spectrum change in space?

Examining visible light from the sun and other stars has shown lines in space called absorption lines. These patterns of lines help to reveal that certain elements in the sun act like fingerprints for atoms and absorb colors of light. On top of elements absorbing atoms the atmosphere has also shown to not allow certain wavelengths pass into the earths atmosphere and prohibit colors on the spectrum.

Creation

Visible light is created by "exciting" of electrons in atoms or molecules by electric effects of collisions caused by heat and then "falling" back, shedding the energy difference in the form of a photon.

APPLICATIONS OF VISIBLE LIGHT IN SOCIETY

• Lasers
• Lights
• Phones
• Flashlights
• Sunlight (natural light) allows our eyes to distinguish colors

APPLICATIONS BEYOND THE ELECTROMAGNETIC SPECTRUM

• Visible light is needed for all modern day technology
• Different types visible light exist such as blue light
• Visible light is also produced naturally from the sun

DANGERS ASSOCIATED WITH VISIBLE LIGUT

• Risk is not overly present with most visible light
• Dangers of vision loss are present with HEV or blue light
• Blue light is present in most modern technology and often is the reason for digital eye strain
• Blue light can also lead to sleep disruption

WAVELENGTH

• The wavelength for visible light is 400 - 700 NM
• The spectrum of 400 - 500 NM is the spectrum for blue light (HEV)
• The length of the wave determines the color you see

WAVELENGTH SCALE

• Blue 450-475NM
• Green 495-570NM
• Yellow 570-590NM
• Orange 590-620NM
• Red 720-750NM

VISIBLE LIGHT FREQUENCY

• The visible light frequency range is from 430 THZ to 770 THZ
• The higher frequencies tend to be the more blue colors
• The lower range consist of red, orange,yellow, etc.

FREQUENCY SCALE

• Blue 600-670THZ
• Green 530-600THZ
• Yellow 500-530THZ
• Orange 480-500THZ
• Red 400-480THZ

INTERESTING FACTS

• Without natural visible light (sun light) we could not be able to see color
• The color red has the longest wavelength while violet is the shortest wavelength
• Light travels at 300,000 km/s
• Blue light, which is given off in most modern screen technology, causes damage to the retinas

The light from the sun, also called white light, reflects off cones in our eyes to help us distinguish colors

Lasers are used for activities such as printing, watching DVDs, or used in careers such as opthamology

CITATIONS

• Wikipedia
• Quora
• Gizmodo
• All about vision
• Nasa