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Showing posts from August, 2018

How does nuclear bomb works ??

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Approximately 73 years ago, humans witnessed the limits to which any human can go for his/her satisfaction.On august 6, 1945 , Japan suffered a great loss done by United States by dropping one of the most destructive weapon of its time Nuclear bomb .  But what is so special about any nuclear bomb?? Everyone says that it is very destructive and can destroy anything ,but question is HOW ?? How a bomb can cause this much destruction?? Let us know it here in this blog. This blog will be little bit scientific so i will try to keep it simple and we will understand basics by leaving the complications.  Let us start with its principle Atomic bombs work on the principle of fission .To understand this firstly know about atoms. Atom is a positive mass consists of proton and neutron in center with negatively charged electrons revolving around it. As you go up the ladder to atoms their mass , number of protons, neutrons and electrons increases and they become complex. Scientists found t

History of calender

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From years we humans are using calendars to determine the date or days. In fact our very first task after getting up from sleep is to look at calendar and plan accordingly. But you ever thought that from where these calendars are originated ??  Let us start with What is calendar?? A calendar is a system of organizing days for social, religious, commercial or administrative purpose.This is done by giving names to periods of time typically like day, weeks, months and years. The term calendar is taken from calendae, the term for first day of month in the roman calendar,related to the verb calare "to call out", referring to the "calling" of the new moon when it was first seen. Latin calendarium meant "account book, register" (as accounts were settled and debts were collected on the calends of each month). The Latin term was adopted in Old French as calendier and from there in Middle English as calender by the 13th century (the spelling calendar is