Why do the rainbow colors appear in that order?

Sunlight is consisting of multiple wavelengths of light. It includes wavelengths of light which is not visible to us, such as infrared and ultraviolet light, as well as the visible spectrum. Reflection, refraction and dispersion of sunlight inside water droplets in the atmosphere, causes the formation of rainbow which appears as a spectrum of light in the sky. Rainbow appears as a circular arc with various colors and it always seen in the section of sky which is directly opposite the sun. A rainbow is not a physical object and it cannot be approached. It does not exist at one

Do You Know what it feels like to be a Test-Tube Baby?

In the case of normal pregnancy, a sperm cell from male fertilizes an egg cell from a woman. The fertilized egg then gets attached to the wall of the uterus and starts to develop into a baby. But in some cases sperm cells fail to fertilize the egg and the embryo will not be formed and pregnancy will not be happening. In such situations people make use of Assisted Reproductive Technology (ART) to help women become pregnant. In vitro fertilization (IVF) is one of the common ART methods. In the IVF procedure, egg cell is fertilized outside the body and

Why are Salt levels around the World’s Oceans different?

Have you been to a beach? For swimming in the sea? What is the taste of sea water? It is salty. Why is it salty? There are many chemical substances in the seawater and presence of those chemicals is the reason sea water is salty. Most of those chemicals are carried by rivers which get chemicals from rocks and soil. The major compound in sea water is sodium chloride, which is commonly known as salt. Generally, seawater has about 35 grams of salt per liter of water. Salinity of sea water is measured in parts per thousand (ppt) which tells us about

Why does hot water freeze more quickly than cold water?

You might have tried to freeze water in your fridge. But have you ever noticed that hot water freezes faster than cold water? If not, try it yourself. This phenomenon where hot water freezes faster than cold water is called Mpemba effect. The Mpemba effect has been a well known physicist since the time of Aristotle who noticed it more than 2,000 years ago. There were many ideas since then to have been put forward to explain the same. One idea is that warm containers make better thermal contact with a refrigerator and so conducts heat more efficiently, which leads

Do You Know- Reaching Absolute Zero Temperature is as difficult as attaining Speed of Light

What is the lowest temperature that you have experienced? Our body temperature is 37 degree Celsius. Room temperature is lower than that which is 25 degree Celsius. Fridges are generally at four degree Celsius and ice forms at zero degree Celsius. Can temperature go below zero degree Celsius? Yes. Temperatures below zero degree Celsius are generally measured in Kelvin scale, where 273 K is equal to zero degree Celsius. Temperature of liquid nitrogen is approximately 70 Kelvin and liquid helium is approximately 4 kelvin. As we decrease the temperature, there are many curious phenomena that happen which have significant effects

Secret behind the formation of High Speed Winds on Neptune

Neptune is the eighth planet in the solar system if we consider its distance from the Sun. Neptune is also the fourth largest and third heaviest planet in our solar system. It is seventeen times heavier than earth. Atmosphere of Neptune is very thick and most of it is composed of gas. Due to this reason, Neptune is considered as a gas giant. Neptune’s atmosphere mostly consists of hydrogen and helium gas and due to the presence of small amounts of methane, the planet appears blue in color. Galileo illustrated the presence of Neptune near Jupiter in his drawings but

THE DAY THE TAP RAN DRY

CHAPTER 1 – THE VILLAGE  Once, there was a village named Rampur in South India near the foot of the hills. It was a scenic village that was picturesque marked by green paddy fields, thatched huts, livestock, boulders, temples for the devout and a Government school for the children. It was not densely populated and the families lived very close by, knowing each other by name. It would get quite hot during the summer with the sun beating down and the temperature would cool down a bit during the winter providing much needed relief to everyone. Farming was the main occupation

Living on Earth and being in Deep Space – The Gravity of the Situation

Picture Credits: Warner Bros. (Gravity, 2013)   Ever wondered? Most of the Universe is pretty empty — that’s why we call it “space” — Lol, sounds literal, right? But most of us have not thought about it that way. If I were to magically transport you someplace randomly in the cosmos, the chances are you’d be a million light years from the nearest substantial object. Evolving on a planet has warped our sense of physics. If I throw an object away from me, it comes back. That’s bizarre! It should just keep going, moving away from me at a constant

Interesting Facts about Mars- The Red Planet

Mars is the fourth planet in our solar system if we count from Sun. It is also the second smallest planet in solar system and it appears red in color due to the presence of Iron oxide on its surface. Mars is sometimes referred to as the ‘Red Planet’ and it gets its name from the Greek god of war. It is very difficult to observe mars, even with very large telescopes, because of its small size. Mars is much smaller in size as compared to our planet but its surface area is approximately same as that of Earth. Gravitational

Fundamental building blocks of our Universe

For many years we believed that matter is made up atoms. Atoms were thought to be the fundamentally indivisible particles and building blocks of everything. But then in 1897 J.J Thompson discovered electrons in a cathode ray experiment. After that, many atom models were proposed and new particles such as protons and electrons were discovered. But later it was discovered that even protons and neutrons can be divided to even smaller particles known as quarks. Each time when a new particle was discovered, it led us to more questions. We always believed that there always was something incredible yet to