VISIBLE LIGHT

• All electromagnetic radiation is light, but we can only see a small portion of this radiation - the portion we call visible light.
• Cone-shaped cells in our eyes act as receivers tuned to the wavelengths in this narrow bard of the spectrum.
• Other portions of the spectrum have wavelengths too large or too small and energetic for the biological limitations of our perception.
• Proponent in visible light: Isaac Newton
• It is given off by anything that's hot enough to glow. ( ex. lightbulb )