However, they are different from each other according to the source of light and chemical reaction. Overview and Key Difference 2. What is Bioluminescence 3. What is Fluorescence 4. Bioluminescence vs Fluorescence in Tabular Form 5.
Summary — Bioluminescence vs Fluorescence. Bioluminescence is the biochemical emission of light by living organisms. It is a type of chemiluminescence. This emission mainly occurs in marine vertebrates and invertebrates. However, we can observe bioluminescence in some fungi species, microorganisms such as bioluminescent bacteria, terrestrial arthropods fireflies , etc.
Generally, the chemical reaction that takes place during bioluminescence is the reaction between a light-emitting molecule and an enzyme. This enzyme usually is known as luciferase.
Correspondingly, the reactant molecule is known as luciferin. Biofluorescence is not a chemical reaction. Biofluorescent plants and organisms absorb low wavelength or dim light, then emit high wavelength light that makes the creatures glow against a dark background. This means biofluorescent organisms do not give off light from their own power source, nor is it a chemical reaction. Examples of biofluorescence are ocean organisms such as corals, jellyfish and a wide array of fish that use this capability for communication, camouflage or mating purposes.
However, many additional functions may also explain this phenomenon. New discoveries in biofluorescent coloring may be used to develop new products, especially in medicine. A fluorometer generally measures biofluorescence. This instrument measures the various characteristics of fluorescence, including its intensity and the wavelength distribution of the emission after the sample is excited. The unit generally used is relative fluorescence units RFU.
Biofluorescence examples are as varied as the creatures capable of emitting light. There are many different types of luminescence including bioluminescence, chemiluminescence, phosphorescence, and fluorescence. These various forms of luminescence differ in their method of emitting light. Chemiluminescence is the emission of light caused by a chemical reaction.
This type of luminescence can be observed by bending and shaking a light stick. Inside the light stick is an encapsulated chemical solution, surrounded by a different chemical solution. Bending the light stick causes the encapsulated chemical solution to break open. Shaking the light stick then causes the two solutions inside the stick to mix. When these chemicals combine, energy is created in the form of light. Organisms that emit light, known as bioluminescent organisms, also produce light through a chemical reaction.
Phosphorescence is the ability of a material to absorb energy from an electromagnetic radiation source, such as a flashlight, and then continue to emit light after the source has been removed. In this activity, the glow in the dark object absorbs or stores the energy from the flashlight and then gradually re-emits the energy as light, even after the flashlight has been turned off. Fluorescence is similar to phosphorescence, in that it is the ability of a material to emit light by absorbing energy from a source of electromagnetic radiation.
However, unlike phosphorescence, fluorescent materials can only emit light during the time that they are exposed to the source of electromagnetic radiation. Extended Activities and Links Have each student research a bioluminescent animal and create a presentation that includes its habitat, diet, and how it uses its bioluminescent ability to survive.
Include photos or illustrations of the bioluminescent animal to share with the rest of the class. Create a mural of an underwater scene that represents a variety of bioluminescent sea animals. Make sure to review with students the difference between paint that glows in the dark a type of phosphorescent material and bioluminescence, which is caused by a chemical reaction.
Consider a field trip to a science museum or mineral show to see fluorescent minerals. This lesson plan was created by the New York Hall of Science in collaboration with Science Friday as part of Teachers Talking Science, an online resource for teachers, homeschoolers, and parents to produce free materials based on very popular SciFri Videos to help in the classroom or around the kitchen table.
Science Friday. Latest Episode. What To Do 1. Activity 1 — Chemilueminscenc 1. Activity 2 — Phosphorescence 1. Activity 3 — Fluorescence 1.
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