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A light-emitting diode (LED) (pronounced /ˌɛliËˈdiË/[1], or just /lÉ›d/), is an electronic light source. The LED was first invented in Russia in the 1920s, and introduced in America as a practical electronic component in 1962. Oleg Vladimirovich Losev was a radio technician who noticed that diodes used in radio receivers emitted light when current was passed through them. In 1927, he published details in a Russian journal of the first ever LED. All early devices emitted low-intensity red light, but modern LEDs are available across the visible, ultraviolet and infra red wavelengths, with very high brightness. LEDs are based on the semiconductor diode. When the diode is forward biased (switched on), electrons are able to recombine with holes and energy is released in the form of light. This effect is called electroluminescence and the color of the light is determined by the energy gap of the semiconductor. The LED is usually small in area (less than 1 mm2) with integrated optical components to shape its radiation pattern and assist in reflection.[2] LEDs present many advantages over traditional light sources including lower energy consumption, longer lifetime, improved robustness, smaller size and faster switching. However, they are relatively expensive and require more precise current and heat management than traditional light sources. Applications of LEDs are diverse. They are used as low-energy indicators but also for replacements for traditional light sources in general lighting and automotive lighting. The compact size of LEDs has allowed new text and video displays and sensors to be developed, while their high switching rates are useful in communications technology.
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Why people start expecting from someone with a brief introduction?
brief introduction about myself
Economics a brief introduction?
supply and demand
A brief introduction of polynomial?
The link to the left will give you the basics.
How do you write an introduction when presenting a new brand?
In the introduction we will have to give a brief idea about your brand. it includes the brand name, objectives, caption etc. From the introduction it will be clear that what this brand for.
How do you wright a good introduction paragraph?
by giving a brief summary of what is happening in the essay
Explain three factors that led to the introduction of a Management information system in an organisation in your country?
explain three factors that led to the introduction of mis in your country
Can an introduction be condensed into one sentence?
Yes, an introduction can be condensed into one sentence to provide a brief overview of the topic or subject being discussed.
What is a brief introduction of optoelectronisc?
Optoelectronic deals in the study of light sensitive electronic devices.
After a brief introduction to your role?
They are probably referring to your business introduction, which is a brief overview/statements of who you are and what you have to offer to the interviewer. you should think of changing it slightly depending on who has asked the question, as each person needs to hear about different areas of your background/experience.
Give five examples of ecosystem structures with their brief introduction?
Give 5 examples of an ecosystem
Which type of publication would be the best source for a brief introduction and summary of a topic?
encyclopedia
Is an abstract the same as an introduction in academic writing?
No, an abstract and an introduction are not the same in academic writing. An abstract provides a brief summary of the main points of a paper, while an introduction introduces the topic and provides context for the reader.
