Light bulbs! History and science…

Now, let’s see the history and science behind “light bulbs”!

The first ever electric light was invented by a chemist Humphry Davy, called “arc lamp” named for the bright arc of light emitted between its two carbon rods.. Later on, incandescent light bulbs with a carbon rod in a nitrogen filled glass cylinder were invented by Henry Woodward and Mathew Evans. They sold their patent rights to Thomas Edison in 1879.

The first practical and more efficient incandescent light bulbs were invented by Edison. Edison and his team discovered a carbonized bamboo filament that could burn for more than 1,200 hours. Bamboo was used for the filaments in Edison’s bulbs and later on tungsten was used.

After that we had neon bulbs, fluorescent lamps, LEDs and so on..

History is done! let’s talk science…

When a light bulb is connected to an electric power supply, an electric current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.

Fluorescent lamps
They work by ionizing mercury vapor in a glass tube. This causes electrons in the gas to emit photons at UV frequencies. The UV light is converted into standard visible light using a phosphor coating on the inside of the tube. The white coating we see on a tube light is actually the white phosphor coating from the inside.. 
LEDs
The basic thing a semiconductor does is, it allows current to pass through it only one way. Semiconductor has two layers, first layer has exited electrons in it and the other has holes with more kinda relaxed state. When electrons are passed through first layer and enter the second layer, the electrons release some energy as light. As the name suggests light emitting diode.
The invention of light bulb is one of the significant revolutionary inventions of all time.
INFORMATIC COOL STUFF!

Hypnosis!!!

Check out the video above to see how hypnosis looks like.. And be prepared to hurt your jaws from laughing!!

Hypnosis has been around us from almost 300 years. Like we see in movies, it’s not brainwashing or magic. Hypnosis is a trance-like state of heightened concentration, we do experience this state when we do something which we enjoy the most…

Hypnosis results in some physical changes, like reduced rates of blinking the eye movements (saccades). Cats are scared of cucumber because they look like snakes, then why are domestic cats scared of cucumber, which haven’t ever seen snakes in their life time? Well.. The reason is, all mammals while they are in the womb experience a dream state called rem state, that is where mammals get their brains programmed. In case of cats they are programmed to be scared of snakes. Now, hypnosis is like altering that program!!

Try identifying the colour in which the words are written below…

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In case of the words written in unknown language, we wont go wrong but, I guess most of you probably “Us” got it wrong in case of the words written in the language we understand! This is called “interference effect” that causes the meaning of the words to take priority over their visual colour. However with the post hypnosis, people were able to do this task effortlessly and even the MRI brain scan revealed that the brain region responsible for language did not become activated..

This explains Hypnosis is real but it’s no magic. Hypnosis is generally regarded as an altered state of consciousness, a broad category that includes meditative states.. There is something called self-hypnosis, where in we hypnotise ourselves to get over anxiety during exams, overcoming tensions, building confidence for achieving goals etc…

Here’s how its done Self-Hypnosis… Self-Hypnosis is similar to Zen meditation, this word should be familiar to you if you had read one of my previous posts “Science of becoming batman” where in Batman(fictional character) learned zen meditation to get most effective rest in a less time…

 

Does stars really twinkle?

The actual stars don’t twinkle. The twinkling we see is due to the earths atmosphere. In fact the stars are glowing balls with never ending glow, placed trillions of kilometres away.

Light from these far away stars first enters the earths atmosphere, and bends while passing through different layers of the earths atmosphere and we get to see a point of light twinkle . Due to this refraction(bending of light), the stars appear to be twinkling. The technical term for this is “STELLAR SCINTILLATION”.

This twinkling of stars helps astronomers to differentiate planets from stars.

As we know, our own sun is a star, then why it doesn’t twinkle?

You guessed it, our sun isn’t so far away from our planet earth. For this reason the refraction is not noticeable.

Here’s a fun fact, when we look at a star, we actually look at the image of the star. In real time, the star may not be there at that particular position, because the light takes comparatively more time to reach our eye from the star.

What if everyone on the earth jumped at once?

First let’s talk the effect. When all of us collectively jump at once( a 30cm maybe), we will be able to push our planet Earth, 1/100 of the width of a single hydrogen atom. Is that a big deal? Well.. No, tried our best though;)

For any rotating body, if the mass shifts towards the center, the rate of rotation increases. In this case, the rotating body is our planet Earth and the mass we are talking about, is us.

As the Earth rotates faster, we loose “Time”:(. Powerful earthquakes can redistribute mass. The earthquake in Japan in 2011 moved so much mass toward Earth’s center that every day since then we run 0.0000018 seconds shorter. Thankfully, that’s too short.

So, this clearly explain that our puny little mass( together at one place) cannot effect the rotation of our Planet, but this may cause Earth Quakes.

 

THE LIEBSTER AWARD!!!

Hey, how are you guys doing? I know I am irregular these days. But I do have a very valid reason.. EXAMS!! But, I will be spying on you now and then though ;).

Lets get to the award now “Liebster Award”… Thank you so much for nominating me for this award Muskan. Go visit her blog, great interesting writings. Awards are always special, boosts our confidence. These are the proofs that someone out there is reading what we write and they like our writings…;).

So, here are the rules…

Rules:
1. Post the award on your blog.
2. Thank the blogger who nominated you, and include a link to their blog.
3. Write eight random facts about yourself.
4. Nominate eight bloggers who you think are deserving and who have less than 200 followers.
5. Answer the questions put forward by the nominating party and put up 8 questions for your nominees.

8 random facts about me:

  1. I am an Engineering student.
  2. I am extremely fascinated about the science that creates the useful technology.
  3. I watch a lot of action movies and TV series.
  4. I go to college every day..;););)… What? Is that even apt for this context? I don’t know what to write here. Ok bear with me.
  5. One of my greatest inspirations is STEVE JOBS.
  6. I love calisthenics.
  7. I love the colour Orange.
  8. I am an Optimist.
Now, its time to answer the questions…
1. How many books have you read till date? Which is your favourite?
I don’t really read much, but one of the book series I have read was Percy Jackson.
 2. Which song is the most played on your playlist right now?
Right now that’s the “In the end” by Linkin Park. Probably all best songs by LInkin Park are on my playlist right now.
3. Have you ever been stalked? Like in real life?
Actually no..
4. What is your deepest desire?
My deepest desire right now is to turn my blog into a very big self hosted website..
5. Are you a better speaker or listener?
I am more kind of a good listener, no wait, Maybe both but a bit of edge to listening.
6. Which F.R.I.E.N.D.S character do you relate yourself to the most?
I recently started watching that show and I really liked it, it was extremely funny. Every character is awesome, maybe I like the Joey’s character the most.
7. A memorable quote?
“Here’s to the crazy ones, the misfits, the rebels, the troublemakers, the round pegs in the square holes… the ones who see things differently — they’re not fond of rules… You can quote them, disagree with them, glorify or vilify them, but the only thing you can’t do is ignore them because they change things, they imagine, they invent, they imagine, they heal, they explore, they heal, they create, they inspire… they push the human race forward, and while some may see them as the crazy ones, we see genius, because the ones who are crazy enough to think that they can change the world, are the ones who do.”
This is my favourite quote by Steve Jobs… Also this is on one of the walls of my room.
8. A girl you had the biggest fight with months ago turns out of the blue and behaves like nothing happened. What do you do?
First thing, I never had a fight like that… For months!! If that scenario really happens to me, I just forgive *optimism*;);)
So, here are my Questions..
1. Are you a student?
2. What’s your Favourite thing to do?
3. Who’s your inspiration?
4. When and Why did you start blogging?
5. What’s your biggest obsession right now?
6. what’s your favourite colour?
7. What’s your opinion on EXAMS?? ;);)
8. Did you really read my articles, If yes, what are your suggestions? If no, go ahead and give me a few suggestions… That’s funny, I am not getting any questions anymore…
So, its my turn to nominate right… CONGRATULATIONS you have been nominated… All those bloggers who are reading or read this article are nominated… Don’t hesitate go ahead and respond to your nomination.. ;);) 
Thanks for reading… See you…
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