How is visibility measured?
Description:
Visibility is measured using a visibility meter or visibility sensor.
Explanation:
Visibility Meter or Visibility Sensor: These devices measure the clarity of the atmosphere by assessing the distance at which an object or light can be seen and identified. They are often used in meteorology to monitor visibility for transportation, especially in aviation and road traffic.
Why Not Barometer or Hygrometer?
Barometer: Measures atmospheric pressure and does not provide direct visibility readings.
Hygrometer: Measures humidity levels in the air, which can indirectly affect visibility but does not measure it directly.
Summary: The correct tool for measuring visibility is the visibility meter or visibility sensor.