How large is the visible light portion of the Electromagnetic Spectrum?

The human eye can detect up to 700 nanometers but the range adjacent to the visible spectrum is called the near infrared and the longer wavelength part is called far infrared. The region just below the visible in wavelength is called the near ultraviolet. Hence the visible part of electromagnetic spectrum lies in between ultraviolet and infrared.

compost can be added to topsoil as a:

pesticide

the answer would be knowledge about cars!