Answer: Near Infrared
Firstly, it is necessary to explain that the infrared radiation is divided into three sections: near infrared (NIR), medium infrared (MIR), and far infrared (FIR).
Now, Near Infrared is the region of the electromagnetic spectrum located between visible light and the medium infrared, whose wavelength extends from around 780 nm to 3000 nm.
From this we can deduce that the wavelength of 800 nm is within this range.
