To produce thermogram it needs infrared wave. It is a radiant energy which cannot be seen by naked eyes and it was discovered by Sir William Herschel, an astronomer in the year 1800.
Infrared Wave.
It detects Infrared radiation.
Electromagnetic waves
The electromagnetic wave used here is Ultraviolet wave...
A thermogram is a device which measures heat through use of picture. The darker the colour, the cooler the object. White is the hottest point of the scale and Black is the coldest. A thermogram can be used in medicine - for brain scans and other explorative means. It can also be used to check insulation in buildings.
Radio 'waves'.
Electrical (electromagnetic) energy is used. Light energy ( another form of electromagnetic energy) is produced.
It produces an UltraViolet electromagnetic wave. This can vary because there are several different lasers that can be used in lasik surgery.
Electromagnetic waves
The electromagnetic wave used here is Ultraviolet wave...
A thermogram is a device which measures heat through use of picture. The darker the colour, the cooler the object. White is the hottest point of the scale and Black is the coldest. A thermogram can be used in medicine - for brain scans and other explorative means. It can also be used to check insulation in buildings.
Gamma rays
Electromagnetic energy
Radio 'waves'.
Electrical (electromagnetic) energy is used. Light energy ( another form of electromagnetic energy) is produced.
You could conceivably used any type of radiation to identify substances however the most commonly used ones are the Ultra-violet as they produce fluorescence in the visible range.
XRAYS
UV (Ultra- Violet)
It is UltraViolet Radiation