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.

 

“Making water from air”. A self filling water bottle!!

As we know, there is water scarcity in many parts of the world. There are so many researchers working to find different ways to overcome this problem. One such solution is Fontus “self-filling” water bottle.

We actually can extract water from the moisture present in the air. An Austrian designer Kristof Retezár’s, put this theory into a water bottle. fontus-water-bottle-designboom03

This is a cool looking biking accessory, which turns air into water, when you ride. Fontus water bottle uses solar power to activate the condenser with a Peltier Element.

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It’s essentially a cooler with two chambers that facilitates condensation, and takes in air as the bike moves, which is then slowed and cooled down by barriers that allows it to condense and form water, which is channelled and collected in the bottle.

This auto filling water bottle can produce 0.5 liters of water in an hour. Well… This number varies from place to place, depending on the humidity and the temperature.

Fontus water bottle may not work in urban cities because of the pollution in the air.

This is a very useful device. Hoping for many more useful and productive solutions for water scarcity.

 

Theory of General Realativity and Special Relativity?

 

First let’s see special relativity.

For an observer moving at constant velocity, the speed of light within a vacuum is the same no matter, the speed at which an observer travels.

Which precisely tells that, when we see an object moving at a very high speed (constant velocity), the objects appear to be compressed.

Events that occur at the same time for one observer could occur at different times for another.

General theory of relativity

Albert Einstein put forward his special theory of relativity in 1905. With a great work and effort, after ten years, in 1915 he put forward his General theory of relativity, where the limitations of special relativity ( no acceleration) were eliminated.

In General theory of relativity, the gravitational force is considered, since, the accelerating motion is acceptable. The space-time is assumed to be a fabric. Every other planet and star applies gravitational force on this fabric which facilitates the planets to move around the stars.  This looks something like the image below.

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Gravitational waves are also indirectly assumed in General relativity( learn more about the Gravitational waves here Gravitational waves).

This scenario is clearly understood with the video below.

Also the Electromagnetism works on the same principle. Let me know, what do you think?

 

 

Gravitational Waves?

 When we wiggle a charge we get electromagnetic radiation, similarly if we wiggle a mass we get gravitational waves. These Gravitational waves are extremely weak, it is tough to detect them.

As the above video shows, When large masses move suddenly, some of this space-time curvature ripples outward. When two dense objects such as neutron stars or black holes orbit each other, space-time is stirred by their motion and gravitational energy ripples throughout the universe.

 Laser Interferometer Gravitational-Wave Observatory (LIGO) is the one which detect the ripples in space-time by using a device called a laser interferometer.

You probably heard something called “Gravitational waves have quantum origin”, which means, around the time of big bang, there are some particles called “Gravitons” as the universe expanded the gravitons got stretched and now we call then Gravitational waves.

Albert Einstein predicted Gravitational waves as a part of General Relativity in 1916. And we found the foot prints of Gravitational waves in recent years while trying to know the origin of our Universe (learn more about origin of our universe here Origin of our universe).

 

 

What are trees made of? Where does their mass come from?

We often see huge trees around us, ever thought what those trees eat to gain such tremendous structure and mass?

Well… We see the roots of the trees going deeper into the soil and the fair guess is, the trees may gain their mass from the soil. But that isn’t the case here. The trees only take a little amount of required nutrients and energy from the soil, water and sunlight.

Somewhere around 1600’s, a scientist called Jan Baptist van Helmont researched on mass of trees and performed an experiment, wherein he took a pot full of soil and weighed it. He grew a tree for 5 years in that soil. He took a strict care of the soil in the pot. After 5 years the mass of soil reduced just by a few grams and the weight of tree was a few kilograms.

Aren’t we missing one important ingredient here? You guessed it, that’s “Carbondioxide”. And let’s get to the answer now, trees are made of Carbondioxide!!

And yeah, we exhale carbondioxide and loose mass. Where as the trees inhale the carbondioxide we exhaled, to gain mass.

So, indirectly we are becoming trees;)

 

 

 

A pen that draws in 3 Dimensions!!

Yes, you read it correct, we have seen 3D printers for a while now (learn more about 3d printing here 3d printing), but now we are gonna talk about something which can literally draw in 3D.

The video above explains it everything!! 3Doodler is the world’s first 3D Printing Pen. Using ABS or PLA plastic (the material used by many 3D printers), 3Doodler draws in the air or on surfaces. A 3D pen doesn’t need any computer.

How it works?

but-ve-3d-02

When we start to draw, the pen extrudes heated plastic, which can be moulded and at the same time rapidly cools and quickly hardens to a strong structure.

A 3D pen allows us to draw above the paper providing an unlimited space for imagination and designs.

Now, many companies are manufacturing these 3D pens.

So, what do you think about this?

How were the PYRAMIDS built?

Pyramids are one of the most extraordinary constructions of the ancient world. Since ages we were trying to find out how these pyramids were constructed and how they did manage to pile all those heavy stone. We had many theories too.. But in 2014 Physicists found the answer!

So, the recipe was simple water and sand! The ancient Egyptians who built the pyramids may have been able to move massive stone blocks across the desert by wetting the sand in front of a contraption built to pull the heavy objects.

Physicists at the University of Amsterdam investigated the forces needed to pull weighty objects on a giant sled over desert sand, and discovered that dampening the sand in front of the primitive device reduces friction on the sled, due to which the Egyptians were able to move heavy rock each weighing nearly ton.

BuildingPyramids6LWW[1]

But the proportion of water and sand is important. “If you use dry sand, it won’t work as well, but if the sand is too wet, it won’t work either,” Bonn said. “There’s an optimum stiffness.”

The picture below was actually an Egyptian painting explaining the construction of a pyramid, but until now it was mistakenly interpreted to some other painting explaining water purification.

wallpainting

 

And yeah it feels good to be back!!;)

Renewable energy sources!!

Renewable energy sources are the naturally occurring sources, used to create clean energy. We have invented many different ways to create clean energy through renewable energy sources. One of the most important reasons to start using some alternative energy sources to create energy is that, In near future we may run out of the most extensively used fossil fuel and it is more likely to replace fossil fuels with electricity which can be obtained through various renewable energy sources.Unlike the traditional renewable sources like solar energy and wind energy, let’s see some of the developing and futuristic renewable energy sources.

Tidal energy – Tidal power is non polluting. Although the tidal power is variable due to various factors like gravity they are reliable and predictable and their power can make a valuable contribution to an electrical system which has a variety of sources. Tidal electricity can be used to displace electricity which would otherwise be generated by fossil fuel (coal, oil, natural gas) fired power plants, thus reducing emissions of greenhouse and acid gasses. First time ever in the world there is a wave-powered desalination plant that provide clean drinking water.

Piezoelectricity- There are certain materials called Piezoelectric material, which on applying mechanical stress produce electricity. This concept can be used in various ways like fitting a peizo electric material in a shoe, where there is always some pressure applied while walking. The Piezoelectric material is composed of equal number of electrons and protons so, the charges cancel out giving no net zero charge. As we apply pressure on this type of materials, the charges get out of balance and they end up giving some voltage at it ends. To know more check out my article on piezoelectricity here Piezoelectricity

Quantum dot solar cell technology– This might sound familiar to solar energy, like obtaining electricity through solar panels, but this isn’t that similar. Quantum dot solar technology allows highly efficient solar panels to double as transparent windows. In these devices, a fraction of light transmitted through the window is absorbed by nanosized particles (semiconductor quantum dots) dispersed in a glass window, re-emitted at the infrared wavelength invisible to the human eye, and wave-guided to a solar cell at the edge of the window. If this technology still develops then we might see every sun exposed window covered with this Quantum dot solar panels.

Hydrogen power – Hydrogen fuel is basically an alternative fuel that has potential in dramatically decreasing the energy consumption of vehicles. It can be obtained by burning H2 and O2, which in turn could produce electricity and heat. The by-products in this process include H2O and small amounts of nitrogen oxide. Since the production of Hydrogen Fuel produces non-pollutants, many experts believe that Hydrogen Fuel could be an eco-friendly alternative to our current energy sources. In addition, Hydrogen Fuel can also be commercialized.

Fusion– All the sources we have seen above were perfectly possible and practiced in real life. But this particular source is very hard and scientists are working to sort out a solution. So, for now this is still a theory, let’s see. Unlike fission reactions, fusion reactions does not give out any nuclear wastes. Scientists described fusion as “trying to put sun into a box”. Well… This is extremely tough to do this. In 2013 at Lawrence Livermore National laboratory in USA did an experiment on fusion where for the first time a fuel capsule gave off more energy than was applied. Many countries are experimenting on fusion to create electricity which may serve with power for years.

CONCLUSION – So by using renewable sources we will be able to create eco friendly clean energy. We are depending more on fossil fuels which are limited and cause pollution. So, by replacing them with electricity created by renewable sources is extremely advantageous. Even many automobile companies are trying to make more efficient automobiles running with clean electricity.

This was actually a part of my paper presentation, hope yo got cool info…. And do expect few articles on more renewable sources in near future… 

 CELEBRATING 100th ARTICLE WITH MY 100 FELLOW BLOGGERES!! 

This is a big moment for me. This is my 100th post with more than 100 wordpress followers ( 104 followers ;)). Thank you so much guys, thanks for all your support, thanks to all those famous wordpress bloggers who supported me, gave answers to many silly questions of mine. My blog has got 2 100’s this time.  So this post has got some significance and this post should be big.

For that reason I have decided to link all my favourite articles on my blog. Damn this is too tough to select few from 100, all 100 are my favourite, let’s see how many I choose. Here we go..

Well before you read my favourite posts, let me tell you something. All those you are about read are those which are most interesting and fascinating things I shared on my blog since I started, everything I learnt, every fascinating thing I shared, every award I got. Thanks to all my followers and readers of my blog. Hey you know what all these lines are to be written at the bottom, but I have a doubt that you may not reach the bottom scrolling all the way down 😉 that’s a huge list with full of cool, fascinating, informatic and interesting stuff. Trust me that’s worth reading.

Thanks for bearing me😜😜 keep reading my blog and keep bearing me… 😜😜

“On virtual reality”. My first ever post

3D Printing

Quantum Dots

Piezoelectric effect

6 Degrees of separation

Tips to choose a smart phone

On 4D printing
Northern lights
On origin of our Universe
On mirrors flipping our image
How touch screen works
Light pollution
What’s mass?
Where did wind come from
On Windows 10
Abdul Kalam
Fast charging
The most radioactive places on earth
Warmhole, the fastest transport
Display resolution vs pixels
Are we both seeing the same colour?
What’s a Dimension?
What’s the colour of a mirror?
Can we go faster than light?
Recording dreams
50 follow;)
Nature of time
Most luxurious cars 2015
3D sound
IOS9
The dream smart phone, Saygus
Worlds roundest object
Quantum computing
Total marvel story
Microsoft hologram
Ferrari F80
Dark matter
Entrepreneurship
Black hole
Quantum dots?
Drones
The company Pebble..
Award
Award 2
Award 3
Wow, now how was the ride on this big article? Let me know…