The sensitivity of a remote sensing detector to differences in signal strength is known as:

Correct option is A

Explanation:
Radiometric resolution refers to the ability of a sensor to detect slight differences in energy (signal strength). It defines how finely a sensor can represent or differentiate variations in the intensity of the reflected or emitted energy. A higher radiometric resolution means finer sensitivity.
For example:
· An 8-bit sensor can differentiate 256 levels of brightness (2⁸).
· A 12-bit sensor can distinguish 4096 levels (2¹²), making it more sensitive.
Information Booster:
Radiometric resolution is crucial in detecting subtle differences in surface features, especially in applications like:
· Vegetation health analysis
· Water quality monitoring
· Thermal imaging in night vision and disaster detection
The more radiometric levels available, the better the contrast in imagery, improving classification accuracy and detail in interpretation.
Additional Knowledge:
· Spectral resolution: Ability to distinguish between different wavelengths or bands of the electromagnetic spectrum.
· Spatial resolution: Refers to the size of the smallest object that can be detected, i.e., pixel size (e.g., 10m, 30m).
· Temporal resolution: Describes how frequently a sensor captures imagery over the same area (revisit time).