What Is Blue Light? The Electromagnetic Spectrum

All light, including blue light, is made up of electromagnetic particles that travel through the air to our body in waves. These waves emit energy and depending on the colour, the strength and range of the light can differ. A shorter wavelength is associated with higher energy levels. The unit of measure for light is nanometres (nm) with 1 nanometre equalling just 1 billionth of a meter. Grouped up these items create the electromagnetic spectrum, but only some of these are visible to us.Blue Light & The Electro Magnetic Spectrum. Radio Waves, Microwaves, Infared, Visible Light, Ultraviolet, XRays, Gamma Rays. Wavelengths and Visible Light

Electromagnetic Wavelengths

  • – Gamma Rays
  • – X-Rays
  • – Ultraviolet (UV) Rays
  • – Visible Light
  • – HEV Light (High Energy Visible)
  • – Infrared Light
  • – Radio Waves

 Blue Light & The Eye

Science has proven the human eye is especially sensitive to light inside the ‘visible light’ spectrum. Visible light consists of these colours: violet, indigo, blue, green, yellow, orange and red.The Visible Light Spectrum from 700nm to 400nm, Red, Orange, Yellow, Green, Blue, Indigo & Violet

Blue light has one of the shortest wavelengths and produces a much higher amount of energy. Many studies suggest exposure to the blue light spectrum over time causes severe long-term damage to your eyes and can affect other areas of our brains.

The blue wavelength is excellent during the day as it increases attention, improves reaction times, and lifts mood, but it is the most troublesome wavelength at night. Many of us are surrounded by screens everywhere, from the second we leave for work, school, in the car to the last minutes of awake time before (trying) to go to sleep. Overall it makes blue light very difficult to escape.


Blue Light, The Outdoors & Sunlight

As you step outdoors into the sunlight, the human eye is exposed instantly to several visible and invisible light spectrum’s. Blue light and UV light is the most known of these spectrums; they enter our body through the eyes and skin. Initiating chemical reactions in our bodies both inside and outside. A well-known example from UV light is sunburn.Sunlight Outdoors On The Beach. Sunlight & Blue LightSunlight is part of the human race and has been for millions of years, like most animals on planet Earth. It plays an essential role in our survivability as well as being a major contributing factor in the global ecosystem. Sunlight synchronises human and animal sleep cycles known as the circadian rhythm. It’s linked to every part of us, our metabolism, alertness even our mood and mental state. Have you had a stressful day? A short walk in the park or spending time outdoors can completely change how you think and feel, and this is partly due to sunlight.

Blue Light, Sunlight & The Light Spectrum

Many of us do not realise the light emitted by our sun has all the colours of the rainbow. Each colour has a different amount of energy and capability to impact us as humans. Sunlight contains a range of colours, red, orange, yellow, green and blue light, each of these with their specific energy and wavelength (called electromagnetic radiation). When we combine all these colours, we get “sunlight” or “white light”.

Sunlight, The Outdoors, Visible and Invisible Light

Science has proven that the colour we see (or cannot see) links to the wavelength, and this is linked to the amount of energy each colour contains. Long wavelengths, such as those found in the colour Red, has less energy while Blue’s which have shorter wavelengths have more energy. So while we are all cautious about UV light and its damaging effects on our skin and eyes, it sits back to back with Blue Light.

We hope this article clears up where Blue Light sits on the light spectrum. If you want to read more about the damaging effects of blue light, please follow this link: Is Blue Light Dangerous.