Electromagnetic Spectrum

Are the lights that are seen by human eye all that we can think of or is there something beyond that light? This is explained through the concept known as the electromagnetic spectrum.

What Is Electromagnetic Spectrum?

Electromagnetic spectrum or EM spectrum is the range of all types of electromagnetic radiation. The distribution of the radiation is based on their wavelength and frequency. The waves that have shorter wavelength are more energetic while the waves with longer wavelength are less energetic. Based on wavelength and frequency, the spectrum is divided into seven electromagnetic waves. They are measured in Hertz.

Types Of Electromagnetic Waves

Following is the list of types of electromagnetic waves:

  • X-rays: These are parts of the electromagnetic spectrum and their wavelengths are in the range 0.01nm to 10nm and their frequency is in the range 30 PHz to 30 Ehz. X-rays find applications in the healthcare industry.
  • Radio waves: These are part of the electromagnetic spectrum and have the longest wavelengths and huge band of frequencies. The frequency range of radiowaves is 3 kHz and 300 GHz. Radio waves find applications in radio communication, broadcasting etc.
  • Microwaves: These are part of the electromagnetic spectrum and is known as microwave radiation. The frequency range between 300 MHz to 300 GHz. Their wavelength range is between 1nm to 30cm. In the electromagnetic spectrum series, microwaves are between infrared radiation and radio waves.
  • Infrared radiation: These are the part of the electromagnetic spectrum and their wavelength range is between 710nm to 1mm. Infrared radiation is also referred to as thermal waves as they have heat-inducing property.
  • Ultraviolet (UV) rays: These are the part of the electromagnetic spectrum with a wavelength between 10nm to 400nm. Their frequency is between 800 THz to 30 PHz. When there is a continuous exposure of the skin to UV rays, they will result in skin and eye diseases.
  • Gamma rays: These are part of the electromagnetic spectrum which includes visible as well as invisible radiations. Gamma rays have the highest frequency which is greater than 10 Hz and the wavelengths are short which is below 100pm.
  • Visible light: These are part of the electromagnetic spectrum which lies between UV rays and infrared rays. The wavelengths of visible light are 400nm to 700nm and the frequency range is between 400 THz to 800 THz.

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