Ravela Da Cruz


Visible Light Spectrum

White light

optical refraction


primary colors

color perception

Light And Color Study Guide

Visible light is a small portion of the electromagnetic spectrum that can be sensed through our eyes.


It's always awe-inspiring to observe the planet's colorful wonders. One such stunning sight is the Rainbow Mountain in Peru's Andes. Hikers frequently embark on a challenging climb to see the thick rainbow stripes of the skillfully placed mineral formations. The appearance of colors also frequently makes us question how and why we are able to perceive them. Let's delve deeper into the subject to find out the answer.

hill Source


The meaning of light and color is not restricted to the way we use them in everyday language. 

  • Light is electromagnetic radiation (consisting of electric and magnetic fields) that moves the fastest in a vacuum.

  • On the other hand, color is electromagnetic radiation having a specified range of wavelengths visible to the naked eye. 

  • The electromagnetic spectrum is a collection of electromagnetic waves as per the frequencies and wavelengths.

  • Here we’ll only talk about a part of this collection of electromagnetic waves.


Visible Light Spectrum

  • The visible light spectrum is the part of the electromagnetic radiation spectrum that can be seen with the naked eye.
  • That basically translates to the colors that the human eye can see.
  • The observed color is determined by the wavelength of light, which is linked to frequency and energy.
  • The below image touches upon some characteristics of visible light.

spectrum Source


  • White light, which encompasses several or all of these wavelength ranges, is the most common kind of light with which we contact.
  • Due to optical refraction, projecting white light through a prism leads the wavelengths to curve at varying angles.
  • The light that results is separated into the visible color range consisting of seven colors (violet, indigo, blue, green, yellow, orange, and red).
  • A rainbow is created when airborne water particles function as the refractive material.


Our perception of light is primarily based on the wavelengths reflected by an object. When we gaze at a yellow t-shirt, for example, it absorbs other wavelengths of light and reflects the yellow light, allowing us to see it as yellow.


  • White light can also be made by mixing only three distinct light frequencies.
  • Any three colors of light that, when combined with the correct intensity, produce white light are known as primary colors of light.
  • Red (R), yellow (Y), and blue (B) are the most frequent primary colors, as they correspond to the sensitivities of the three color-sensing cones in the eye.


  • Light is electromagnetic radiation consisting of electric and magnetic fields.
  • Color is electromagnetic radiation having a specified range of wavelengths visible to the naked eye.
  • The visible light spectrum is the part of the electromagnetic radiation spectrum that can be seen with the naked eye. 
  • White light is the combination of all the lights in the visible light spectrum. 
  • Red (R), yellow (Y), and blue (B) are termed primary colors.



Q. Does electromagnetic radiation have color?

Yes, visible light is electromagnetic radiation that has color. 

Q. What is light as electromagnetic radiation?

Light is a type of electromagnetic radiation that can be perceived by an eye. 

Q. What are the colors of the electromagnetic spectrum? 

The visible light spectrum in the electromagnetic spectrum has 7 (Violet, indigo, blue, green, yellow, orange, and red ) colors in it. 

We hope you enjoyed studying this lesson and learned something cool about Light and Color! Join our Discord community to get any questions you may have answered and to engage with other students just like you! We promise, it makes studying much more fun!😎


  1. Light and Color:https://flexbooks.ck12.org/cbook/ck-12-physics-flexbook-2.0/section/13.3/primary/lesson/color-ms-ps/ Accessed 14th April 2022.
  2. The Physic of Light: https://www.pa.uky.edu/~sciworks/light/preview/color4aa.htm Accessed 14th April 2022.