if humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?\n○…

if humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?\n○ ultraviolet light detects the presence of radioactive substances.\n○ ultraviolet light shows cold areas as blue and warm areas as red\n○ ultraviolet light causes substances to fluoresce and give off visible light\n○ ultraviolet light transmits information to am and fm radio receivers

if humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime?\n○ ultraviolet light detects the presence of radioactive substances.\n○ ultraviolet light shows cold areas as blue and warm areas as red\n○ ultraviolet light causes substances to fluoresce and give off visible light\n○ ultraviolet light transmits information to am and fm radio receivers

Answer

Brief Explanations:

To solve this, we analyze each option:

  • Option 1: UV light isn't mainly for detecting radioactive substances (that's more for Geiger counters or other radiation detectors).
  • Option 2: Thermal imaging (infrared) shows temperature - related color coding, not UV.
  • Option 3: UV light can cause certain substances (like bodily fluids, some inks) to fluoresce (emit visible light), which is how it's used in forensics to reveal evidence not visible normally.
  • Option 4: UV light doesn't transmit to AM/FM receivers (radio waves do that).

Answer:

C. Ultraviolet light causes substances to fluoresce and give off visible light