Near infra-red (NIR) spectroscopy is a technology that has vast applications in agriculture.
Near infra-red is a small part of the spectrum of light (700 - 2500 nm). VISIBLE (400–700 nm)
At one end of this spectrum are the high energy waves such as x-rays and ultraviolet, while at the other end of the spectrum are the low energy waves such as infra-red, micro waves and radio waves.
Near infra-red is a part of natural sunlight and is generated by several light sources, such as tungsten halogen car driving lights.
Near infra-red is between the visible and the infra-red.