How The Fluorescent I Lights Work?
Things glow when they are hot. His true in a majority of the cases. In bulbs, there is a filament that must be heated to high temperature such that it gives off light.
There are materials which can glow in different colours in absence of being hot. They give off the glow when invisible ultraviolet rays fall upon them. These invisible rays “excite” the materials and the giving off of light that results is called “fluorescence”.
The word fluorescence is derived from the mineral “fluorspar” which can fluoresce in different colours. Some materials fluoresce only when they are in gas form; others when in liquid form; still there are others – as a solid material. The most important ones are solid crystal powders which are called “Phosphors”.
Fluorescence comes about when the “exciting” rays fall on the fluorescent material and get absorbed. Now, these rays are a form of energy. Certain atoms within the materials take in some of this energy and get “excited’. After a while in this ‘excited’ state they return again to their natural, original state. During this return, they give off the extra energy they have absorbed in the form of light. This is called “Fluorescence”.
The fluorescent lamps work on this system; when Mercury vapour is put into a long glass tube. An electric current is passed through this tube and as result ultraviolet rays are produced. The inside wall of the lamp is coated with phosphor, and this phosphor absorbs all the ultraviolet rays. It becomes “excited”, and gives off light.
By means of fluorescence, about four times as much white light can be produced as by ordinary incandescent lamps. Florescent lamps last ten times as long as ordinary incandescent lamps. They can be made in various shapes. These are the considered advantages of the fluorescent lighting. Thus more and more homes, hospitals, factories and schools are adopting this system of lighting.
Related posts:
What were the distinct services or choices offered first by the International airlines?
1st in the World
When did fish develop? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 a...
General Knowledge
What is a toucan? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and 12...
General Knowledge
GK Question "The Matches Was Invented By Whom?" general knowledge book English 2021 current affairs ...
General Knowledge
Who invented the paper clip? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10...
General Knowledge
GK Question "Tell Me About Milky Way" general knowledge book English 2021 current affairs quiz and a...
General Knowledge
What is an autopsy? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 and ...
General Knowledge
Can comets collide with planets? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9...
General Knowledge
When did dinosaurs die? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 ...
General Knowledge
GK Question "Why The Same Language Is Not Spoken By All Of Us?" general knowledge book English 2021 ...
General Knowledge
GK Question "About The End of Ice Age?" general knowledge book English 2021 current affairs quiz and...
General Knowledge
Are there mountains under the sea? Complete General Knowledge Question and Answer for Class 6, 7, 8,...
General Knowledge
Why do hot air balloons rise up? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9...
General Knowledge
Do you know “Largest mural painting in Asia”.
Do you know
What is a nuclear reaction? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10,...
General Knowledge
GK Question "How Did Candy Originate?" general knowledge book English 2021 current affairs quiz and ...
General Knowledge
What is the riddle of the Nile? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9,...
General Knowledge
How big were the babies of dinosaurs? Complete General Knowledge Question and Answer for Class 6, 7,...
General Knowledge
Could dinosaurs smell? Complete General Knowledge Question and Answer for Class 6, 7, 8, 9, 10, 11 a...
General Knowledge
Why is there frost more often on clear nights than on cloudy ones? Complete General Knowledge Questi...
General Knowledge