What is an LED? Definition, Types, Working Principle, and Uses

We all know, for a long time people used oil lamps, hurricanes to illuminate the night. At that time, the invention of the bulb gave a new direction to science. Now modern technology uses a lot of devices to generate light such as tungsten lamp, CFL, LED, etc. In all of them, the most efficient device to produce light is LED.

If you do not know much about it, this article is for you. Today, I am going to unlock the details of the LED. In this article, you will know -

1. What is an LED?
2. Symbol of LED
3. What are the types of LEDs?
4. How does LED work?
5. Uses of LEDs

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What is Matter? Definition, States of Matter

What is Matter?

According to classical physics, anything in this universe that has mass and volume (that occupies some space) is called matter. Matters are all around us, these are some things that you are seeing and touching every day such as rock, trees, anything you consume as food, whatever you drink, and the oxygen that you take in through breath are all matters.

Matter exists in different states (also known as phases) such as - solid, liquid, and gas – for example, water exists as ice ( solid form), liquid water, and gaseous steam – but other states of matter are possible such as plasma, Bose-Einstein condensates, fermionic condensates, and quark-gluon plasma.

All matters that we know so far are made up of atoms which are composed of electron, proton, and neutron. Atoms come together to form molecules, which act as building blocks for all kinds of matters. According to classical physics, matter, which is made up of electron, proton, and neutron is considered to be a particle for scientific interpretation.

But the concept of matter is further complicated when it comes to quantum mechanics. In the quantum mechanics view, matters behave both like particles and waves which is also known as the duality nature of matter.

But the matter we are talking about is only 5% of the entire universe. The remaining 95% of the universe is made up of dark matter and dark energy, which is completely unknown to us.

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What is Artificial Intelligence (AI)? Explained

What is Artificial Intelligence (AI)?


1. What is Artificial Intelligence (AI)?
2. History of Artificial Intelligence (AI)
3. Types of Artificial Intelligence (AI)
4. How does Artificial Intelligence (AI) Work?
5. Applications of Artificial Intelligence (AI)

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What is dark energy? Explained

What is dark energy

Matters that we know such as planets, stars, galaxies, trees, rocks, etc they are only 5% of the universe. About 27% is dark matter and 68% is dark energy. Both dark matter and dark energy are invisible to us.

So, how do we know that dark energy exists? What research has been done about it? If all these questions come to your mind and you want to know about it, then this article is for you. Today, I am going to unlock the details of the dark energy. In this article, you will know -

1. What is dark energy?
2. What is dark matter?

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