Which term describes the set of exposure values that the receptor can accurately capture?

• A. Dynamic range
• B. Histogram
• C. Lookup table
• D. Pixel pitch

Answer: (A)

Dynamic range describes the set of exposure values the receptor can accurately capture. It’s the span from the lowest useful exposure, where the image remains readable and noise is manageable, up to the highest exposure before saturation, where bright areas lose detail. Within this range, changes in exposure translate into meaningful changes in grayscale, preserving contrast and detail. If exposure falls below this range, image quality degrades from underexposure and noise; if it rises above, highlights clip and information is lost. The other terms refer to different concepts: a histogram shows how pixel values are distributed across the image; a lookup table maps input gray values to output display values; and pixel pitch concerns spatial resolution, not exposure range.