Category Archives: Science

Extinguishing a candle, some funny methods

Extinguishing a candle is very simple. But it can be funny if you associate some science in unusual fashion and Physics Girl doing exactly the same thing. She uses some unusual things like copper coil, baking soda, vinegar, glass and even liquid nitrogen to extinguish fire. Don’t forget heat and oxygen is key ingredients of… Read the rest

Researchers turn Smartphone into microscope

Yes, researchers have made a special lens which turns your Smartphone into a microscope. It’s not a toy microscope, even health professionals will find it useful, researchers say. The research paper is published on journal of Biomedical Optics recently. Most importantly, this lens costs only 1 cent. So a Smartphone & a one cent lens… Read the rest

Photoelectric Effect

Application of photoelectric effect is everywhere around us. Digital camera, light meter in playground, solar panel, night vision device and many things are made using photoelectric effect. Albert Einstein is famous for his special theory of relativity. But he received his Nobel Prize for explaining the photoelectric effect not for his special theory of relativity.… Read the rest

Fluorescent lamp explosion and ballast

Usage of fluorescent lamp is increasing because it’s four to six times efficient than incandescent lamp. Plasma state of matter is used in fluorescent lamps. Resistance of plasma decreases when electricity conducts through it. The danger lies in this property. Uncontrolled current through the plasma in the tube may produce heat and eventually the tube… Read the rest

Uncertainty principle

Werner Heisenberg Werner Heisenberg Uncertainty principle was proposed by German physicist Werner Heisenberg in 1927. Werner Heisenberg (1901-1976) was born in Duisberg, Germany. He studied theoretical physics at Munich, received Nobel Prize in 1932. He stayed in Germany during Second World War and led research for nuclear weapon project. A gunman was sent by United… Read the rest

Bicycle, most energy efficient method of transportation

You will agree that going to a destination on foot is more difficult than going on a bicycle. So you may question, how it is possible? Does bicycle produce energy? The energy comes from where? The answer lies in the fact that bicycle can’t produce or convert energy, but it’s an efficient method of transportation.… Read the rest

Van Allen radiation belts

Radiation belts are two ring shaped layer of plasmas high above earth’s surface. Earth’s magnetic field is responsible for keeping them in place. Sometimes the inner belt is called Van Allen belt because James Van Allen discovered it in 1958. The lower belt The lower belt starts at top of the atmosphere and exists up… Read the rest

De Broglie Hypothesis

Louis de Broglie French physicist Louis de Broglie proposed this hypothesis. It was a ground breaking hypothesis in fact. Earlier Louis de Broglie was a student of history, later he built his career in physics. He proposed this famous theory in his PhD thesis in 1924 (some people think the year was 1923). Newton thought… Read the rest

Mass energy relation in Chemistry

When we hear something about mass energy relation, we imagine the power of a nuclear bomb. It’s correct, when nuclei split into two or three parts it loses mass and that mass is converted into energy. Mass energy relation is one of the consequences of Einstein’s theory of relativity. In fact the famous E=mc²… Read the rest

Greek Alphabet

Greek alphabet Most of us don’t know Greek. But we need to learn Greek Alphabet because it is used in science and mathematics so frequently. I have tried to make a list with English and Bangla pronunciation. Greek_Alphabet… Read the rest