Question

The minimum amount of light energy that must be present for vision is called:

• A. Sensory Ratio
• B. Lumens
• C. Absolute Threshold
• D. Critical Ratio

Hint:

Absolute thresholds are not fixed and can vary depending on conditions like fatigue, environment, or individual differences.

Answer 1

The Correct Option is C

The absolute threshold defines the minimal intensity of a stimulus (such as light, sound, or touch) an organism can detect 50% of the time under ideal circumstances.

• Definition: The lowest stimulus level required for perception.
• Example (Vision): This signifies the dimmest light discernible by the human eye.
• Significance: It helps ascertain the responsiveness of sensory systems.