Question
Cold light emission by glow worms is an example of
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CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Chemiluminescence
Chemiluminescence: Glow Worm Light Explained
The emission of light by glow worms is a biological process known as bioluminescence, which is a specific type of chemiluminescence.
Chemiluminescence is the term for light produced as a result of a chemical reaction. In glow worms, a chemical reaction involving luciferin, luciferase (an enzyme), ATP, and oxygen produces light. This process is often referred to as "cold light" because less than 20% of the energy is released as heat.
- Chemiluminescence: Correct. Glow worms produce light via a chemical reaction.
- Phosphorescence: Incorrect. This involves absorbing energy and emitting it slowly over time, unlike the rapid glow worm light.
- Fluorescence: Incorrect. Fluorescence requires immediate emission of light upon absorbing energy (e.g., UV light) and typically stops when the energy source is removed. Glow worm light is self-generated.
- Quenching: Incorrect. Quenching refers to the reduction or suppression of light emission, not the production of light itself.
Therefore, the cold light emission by glow worms is a direct example of chemiluminescence.
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