Snow is a block of individual ice crystals arranged together. When a light photon enters a layer of snow, it goes through an ice crystal on the top, which changes its direction slightly and sends it on to a new ice crystal, which does the same thing. Basically, all the crystals bounce the light all around, so that it comes …

On a sunny day the bright sunlight bounces off the white snow, making the light even brighter. It usually takes a while for our eyes to become comfortable when we look at something as bright as that. People often wear sunglasses when they go skiing or go to the beach to protect their eyes from the strong light.

Iron goes red when heated because its atoms radiate vibratory waves of an electrodynamics nature which are visible as light at a sufficiently high temperature. At 800 Centigrade the iron is at low-red heat. But as the heat increases the iron will turn bright red, and finally white hot and molten. Heat is passed through the iron by conduction the …

Pablo Picasso — Pablo Ruiz y Picasso, also known as Pablo Picasso (25 October 1881 – 8 April 1973), was a Spanish painter, sculptor, printmaker, ceramicist, stage designer, poet and playwright who spent most of his adult life in France. As one of the greatest and most influential artists of the 20th century, he is known for co-founding the Cubist …

The colour of our hair depends on the amount of pigment (colouring matter) in it. Dark hair contains more of it than fair hair. This colouring matter is produced in our bodies and is controlled by the nervous system. If anything goes wrong with this control through illness but more often by wearing our in old age, then the hair …

According to a popular legend, July was named after Julius Caesar and hence it had 31 days. Later, when Augustus Caesar took over the Roman Empire, he wanted August, the month named after him, to have 31 days as well. Hence, the two extra days were taken from February, which was then left with 28 days. However, some historians don’t …

An article’s color fades when subjected to a chemical reaction in which oxygen is released. This oxygen combines with the natural coloring matter or with the dye to produce a colorless compound. Thus the color of the article becomes paler and is finally taken out together, or bleached. The most famous bleaching agent in the sun, and the process by …

Switch on the television and you are bound to see some cola advertisements. Aamir Khan, a Bollywood hero, pops open a cola and the bubbly drink fizzes to the top. Have you ever wondered what causes the countless teeny bubbles in all these soft drinks? Soft drinks are carbonated, i.e. carbon dioxide gas is dissolved in the liquid. This gas …

An iron can be worked even when it’s not hot. However, it becomes softer when heated, so working on cloth becomes easy. When iron, like any other metal, is heated, it absorbs energy which excites its molecules. This makes the metal softer. This property was known to ancient craftsmen and is used even today in producing iron implements.

Rust is iron-oxide – a molecule consisting of iron and oxygen. When rust forms, the mass of the iron object is increased by the mass of oxygen that has combined with some of the iron.