Blue Moon

A miracle in the sky happened on 31 Dec 2009. The blue moon brightened up more on that night for the excitement of all the people. Though it is mentioned as blue moon the moon was not in blue color. According to the Indians, if the occurrence of the full moon is happened second time in a month, it is called as the Blue Moon. Actually in a year the full moon appears for 12 times but sometimes, it appears 13 times for every 2 to 3 years. This incident happened on December 2nd and again this took place on 31st of this month. All this information is passed on by the Science Popularization Association of Communication and Educators which...

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Blinking Star

The stars, planets and sub planets in the space will be in the circular shape only. But during night times, the moon in the sky appears round in shape and all the stars are blinking. The reason behind this is when the light which comes from the stars travels through various densities of the air and undergoes refraction. Just because of this misplacement, the stars keep blinking. The Moon is not a shining planet of its own. Due to the reflection of light on the moon and the moon being closure to the earth, the light does not undergo much refraction and thus appears circular in shape. The reason for the stars blinking during night times...

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Refraction

The term refraction is defined as the bending of light as it passes from one type of material into another. Because light travels at different speeds in the two materials, it changes its speed at the boundary of the two materials. If a beam of light hits this boundary at an angle, then light hitting the side first will be forced to slow down or speed up before light on the other side hits the new material. This causes the beam to bend, or refract, at the boundary. Suppose we were to place a...

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Watching TV in Dark

In this satellite century, more and more people are watching television for entertainment and subjective knowledge. But many people have doubts regarding the distance that should be maintained from television while watching, mode of watching and the effects of watching television in darkness, etc. Many people believe that the picture on the television can be seen much clearly in darkness. So they close down all the doors, windows, put off the lights and then watch the television. It may be true also. But by watching television in darkness, eyes get tired quickly. Visionary faults may occur. Actually one can watch the television in dim...

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Blurred Vision

The images appear zig zag after the eyes are rubbed. If the eyes are rubbed normally this situation do not takes place. But if the eyes are rubbed with full force, the pressure is fallen on the muscles of the eyes, pupil, and connective tissue and on the eye lenses. This is called as the mechanical stress. This means, the balanced structure which is seen inside the parts of the eye will be damaged temporarily. At that stage, the light rays which passed in to the eyes, do not travel in their normal position. The eye ball does not concentrate totally on the image which is seen in the retina. For some time, the coherence on the vision...

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Tears

Reason for tears when we cut onions There is correct reason for getting tears in the eyes while chopping the onions. There is a substance in onion which brings tears in the eyes and this is called as propenesulfenic. When we cut the onion, this substance mixes in the air and hits our eyes. And then eyes get irritated and we get tears. Science tells that the tears from the eyes are good because the dust in the eyes gets washed awa...

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Hiccups

Why do we hic-hic-hiccup? What causes them? When you hiccup, your diaphragm and nearby muscles convulse, causing you to briefly gulp air. Within 35 milliseconds, the glottis (the opening at the top of the air passage) slams shut, producing that familiar sound of the "hic." Hiccups are usually a reaction to your stomach and digestive system getting wonky. This happens when you eat too much, drink bubbly drinks like soda, or swallow too much air. Some people get the hiccups for no reason at all. Other things that cause hiccups include skull fracture, epilepsy, tuberculosis and believe it or not, constipation (not being able to poop). Unlike sneezing, farting, burping, etc., hiccups don't serve any purpose. They're just annoying and pointless! So how do you get rid of hiccups? Which remedy...

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Currencies of the World

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