Visible light

Period 3 , Laura N. Murguia

Visible light

- Visible light is a form of electromagnetic radiation. It is generally defined as the wavelengths that are visible to most humans eyes.

- The wavelength range for visible light is between 400-700 nanometers(nm). It all varied on what color it is. For example, violet is measured in 400nm while in the other hand red's wavelength range is 700nm.

- The velocity in a vacuum is speed of light (300,000,000 m/s)

- An interesting fact about visible light is that the sun is a natural source of visible light waves. The color of an object that we see is the color of light reflected.

- Another interesting fact is that visible light can also be measured in frequency and it varies from 430-770 THz again it all depends on the color.

- Another interesting fact is that the first person to discover visible light was Isaac Newton. All the way back to the 17th century.

- Some insects can see UV rays that humans cant see

- Another interesting fact is that the colors for visible light are the same colors as the rainbow Red, Orange, Yellow, Green, Blue, and Violet. The color red is the one with the highest wavelength and purple has the lowest wavelength.


- Another interesting fact is that a light bulb is another source of visible light waves.


-More interesting facts is that the color we see if the color that the object or thing didn't absorb from the visible light, for example a green plants are green because they absorb all the colors of the visible spectrum except the color green

- All the colors together makes white light

Everyday applications for VIsible Light

- Everyday we use visible light even when we don't know it, for example the colors that our eyes let us see id due to visible light. Our eyes only detect a small part of Electromagnetic spectrum (visible light) it helps us detect the different colors we see. Like if you are driving and the light turns red visible light helps our eyes detect the color so that way we know that we have to stop.

- Some professional careers use visible light in there career for example doctor use visible light to study the human body, Astronomers use it for space travel , biologists use it to study life, and Physicists use it to study all the aspects of science.

- If there was no visible light we wouldn't be able to see the things we see or the colors it would just be complete darkness.

- visible light helps us to see and distinguish the colors and it helps us know where we are going.

Health impacts

- Negative health impacts on visible light is that it damages your skin sometimes even with sunscreen you still run the risk of your skin getting damaged.

- Negative health impact without visible light radiation the earth would fall apart and the food chains would also and the surface temperatures would plummet.

- Negative health impact to much visible light can cause serious damage to the eyes


- positive health impact without visible light we wouldn't be able to see.

- positive health impact visible light is used for treatment of a variety of skin diseases.

- positive health impact visible light also helps to treat esthetic conditions in the form of a lasers.

- positive health impact visible light it integral to our survival and beneficial in many ways.

Article summary

This article talks about visible light and goes more into detail about how it works and what we are able to see. It talks about how all electromagnetic radiation is light but we can only see a portion of it which is called visible light. We can only see visible light because the other portions of the spectrum have wavelengths too large or too small and energetic for our limitations. It also talks about how when visible light goes through a prism the wavelengths separate into the colors of the rainbow and each color has a different wavelength, frequency, and wavelength range and they all bend. Something I found interesting about this article is that the sun is the main source of visible light waves in our eyes. The corona of the sun cant be seen unless there is a solar eclipse. With visible light scientist are able to find out do much about outer space and hoe it affect the earth and how it helps the earth. Thanks to visible light scientist have found out so much about the earth and everything.
Visible light

Visible Light Video Summary

This video talks about how a rainbow is made and demonstrates how it works. They show an example of how they use a narrow beam of white and a glass prism to creates a spectrum of colors, the same order as a rainbow. The prism makes the light move direction and bend different ways. An interesting thing is that white light is acted by different colors. So when sun hits a pond of water the water acts like the prism causing it to look like there is a rainbow. When we see a color that color actually absorbs all the colors except the color we see which I think is really interesting because I never knew this. Overlapping blue, red and green produces a white color. Who knew that we used visible light everyday in our lives.