220. What statement is true concerning the use of a thermal imager for the purposes of conducting a thermo graphic analysis of equipment?

The imager detects heat patterns in the infrared spectrum without making direct contact with the equipment being evaluated.
The imager detects heat patterns in the infrared spectrum requiring direct contact with the equipment being evaluated.
The imager detects heat patterns in the ultraviolet spectrum without making direct contact with the equipment being evaluated.
The imager detects heat patterns in the ultraviolet spectrum with making direct contact with the equipment being evaluated.

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