关于电灯的介绍ppt

Group Members
Amy 23
Azure 28 Daisy 35
Chandelier
A light which can install on the ceiling
Characteristic: Simple Generous
Floor Lamp
A lamp which is comprised of shade, bracket and base
Characteristic: Soft light Easy to move
Brief history
The first electric light
Made in 1800 by Hunphry Davy, this is called the electric arc
Later
The American Charles Francies Brush manufactured some carbon arcs
No.1
Chang the electricity into light energy
No.2
Resistance generates heat and that this heat can generate light
No.3
When the temperature reaches 2,000 degrees Celsius above, the filament will emit light
As we know , the environment is gradually serious and it will lead the electricity deficit. So it is necessary for us to save the electricity. Now, we have a method to release the problem.
Small Size
to the people of the world
Ease of Use
Summary
Lights
make our life different. It is hard to imagine if we live in a situation of no lights. So We must thank these creative inventors, they make our life different ,their revolutionary invention of promoting the social progress. As the resources in the world is limited, it is necessary for us to saving energy and create beautiful future together.
Incandescent Lamp
Characteristic:
High efficiency Electricity-saving Durable
An early type of stage light in which lime was heated to incandescence producing brilliant illumination.
Table Lamp
Characteristic: Light Convenient Easy to put
A light which is put on the table or desk
Characteristic: Elegant Gorgeous Harmony
A light which is pasted on the wall
Group Members:
Contents
The factors leading the invention of the light The brief history of the electric light The inventors of the electric light The structure and principle of the electric light Some pictures of lights
What is the reasoning for the first electric light invention?
People
want to get rid of the darkness, to enlarge the scope of human activities, to win more time to create wealth for the society.
Characteristic:
High Luminous Efficiency (which is 5 times the ordinary light bulbs)
So
Long-Lived (which is 8 times the normal light bulbs)
it is common and popular
Using the Energy Saving to replace other lights.
Lamps
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Energy Saving Lamp
Also called Compact Fluorescent Light Bulbs (CFLs) first invented in 1978 by the foreign manufacturers Embody mainly through the energy saving lamps and electronic ballast of the low-power can be divided into two kinds of warm and cool colors
Fluorescent Lamp
Producing bright light by using some forms of radiation
Characteristic: Long-lived Environmental protection High color rendering index
The inventor
Thomas Edison experimented with thousands of different materials, eventually produced a bulb that could glow for over 1500 hours.
The work principle