Some of the non-visible types of waves are radio waves, microwaves, infrared rays, and X-rays. The electromagnetic spectrum includes a wide range of light waves, some that we cant see. The frequency range of the visible spectrum is from 405 Terahertz to 790 Terahertz. This means that line spectra can be used to identify elements.Ĭontinuous spectra are produced by electrons being shared between many atoms, giving a huge range of possible frequencies, as shown below. This range is called the visible spectrum. As a result each produces photons with different energy and so the line spectra for different elements will be different. This is not a continuous spectrum as only light of specific frequencies and specific colours are produced.ĭifferent types of atoms have different energy levels. electromagnetic spectrum, the entire distribution of electromagnetic radiation according to frequency or wavelength. This causes line emission spectra to be produced, as shown below. This means that each electron transition will produce a photon of a different frequency and hence a different colour. These lines came to be known as ‘spectral lines’ and were cataloged by heating common elements until they produced light and measuring the wavelengths emitted. A remote control uses light waves just beyond the visible spectrum of lightinfrared light wavesto change channels on your TV. People encounter Infrared waves every day the human eye cannot see it, but humans can detect it as heat. A spectrum can be seen if the Suns light is.
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