Question

write a short note on L. E. D​

Answer 1

$\huge{ \boxed{ \color{pink}{ \tt{ LED }}}}$

A Light Emitting Diode (LED) is one of the latest inventions and is extensively used these days. From your cell phone to the large advertising display boards, the wide range of applications of these magical light bulbs can be witnessed almost everywhere. Today their popularity and applications are increasing rapidly due to some remarkable properties they have. Specifically, LEDs are very small in size and consume very little power. The magnificent, beautiful, dazzling colors involved with LEDs may be quite picturesque.

Advantages of LED:

1. Total power output will be less than 150 milliwatts.
2. The response time is very less – only about 10 nanoseconds.
3. The device does not need any heating and warm up time.
4. Miniature in size and hence lightweight.

Disadvantages of LED:

1. A slight excess of voltage or current can damage the device.
2. The device is known to have a much wider bandwidth compared to the laser.
3. The temperature depends on the radiant output power and wavelength.

Hope this helps