Posts

Mössbauer effect

Image
Recoilless emission and recoilless absorption of gamma photons is called Mossbauer effect. It provides us a technique for producing and studying gamma rays whose energies are extremely well defined. Mossbauer effect was discovered by Rudolf Mossbauer in 1958. This effect is applied in the experimental field by the name Mossbauer spectroscopy. Let us first understand why a  nuclear transitions  occurs. After a radioactive nucleus undergoes decay (alpha decay, beta decay, k-capture) it many times reaches to the daughter nuclei state but contains too much energy to be in a final stable state. Unlike our electrons orbiting the nucleus, the nucleus itself doesn’t really have such orbits which are easy to visualize. So, let us just imagine it having a particular quantized energy. Now, to be in a stable ground state it must lose this extra energy. It does this by emitting gamma radiation of that energy. This is the process of nuclear transition, where the nucleus transitions ...

Welcome to Crash Course astronomy.

Image
Crash Course series has a new surprise for us. Not alone but along with astronomer Phil Plait. CrashCourse is a YouTube channel which produces various videos regarding topics like ecology, history and biology. Hank Greene hosts science topics and John Greene hosts mostly humanitarian topics. And now Phil Plait will be teaching us astronomy through crash course astronomy series available on YouTube which will be premiering on 15 Jan. Phil Plait is said to cover the basic topics like planets, naked eye sky viewing, eclipses, universe, etc. Happy learning! 

Kepler has a good news for us!

Image
Surely,it is exciting to find new things and finding new planets is even more exciting. This has just got better! Kepler has discover eight new planets which are not just ordinary planets but they are earth like! The eight new planets include kepler442b and kepler482b. you can get more information on this at bad_astronomy blog. Dr. Phil Plait has an amazing article about it. Humankind has taken a big leap in the history of astronomy and if these worlds are REALLY earth like than, well, necessity is the mother of all invention.

Uses of ICT in astronomy.

Image
The blog of Phil Plait. ICT is used by us in many walks of life. Similarly, ICT has its importance in astronomy too. But how?ICT does not only mean computers and internet, it also means softwares. Softwares such as Stellarium help the young to awaken the spirit of astronomy in them. The students can use  such softwares to learn about the astronomical objects even in the absence of telescope. ICT, through internet imparts the knowledge of astronomy to people. Blogs on astronomy by various scientists and sceptic writers helps people to learn more about astronomy and people can keep updating their knowledge of astronomy. ICT also helps the people to understand the topics clearly with the help of videos . For example, videos available on 'youtube'. ICT can also be used to make simulations of various astronomical phenomena, like stimulations of the life cycle of stars. This method of learning proves useful for post-graduate students. Universe is the place we live in, ...

Introduction to Astronomy

Image
The Whirlpool Galaxy in the constellation Canis Venatici. Astronomy is a study of the celestial objects in science. Its sub-fields are: Astrophysics Astrobiology Astrochemistry