When something is burnt it is heated to a high temperature .As a result the electrons of the atoms of the burning material absorb the heat energy and move to an excited state. Since they’re not stable in this state they move back to their normal state releasing their energy in the form of light.
Question of the week; How is light produced when something is burnt?
Ever wondered what made Super glue so ‘super’?The only thing that superglue needs to form these strong bonds is hydroxyl ions found in water.almost all surfaces contain traces or a thin layer of water. As Superglue comes in contact with water it forms long, strong chains,which bind the two surfaces together almost immediately forming an almost unbreakable, waterproof bond within seconds.
Elephants’ floppy ears also do more than hearing. With loads of tiny blood vessels on their surfaces, elephant ears act like a cooling system. As they flap their ears the blood in these vessels is cooled,
and the cooled blood is circulated around the elephant’s body.
A crocodile cannot move its tongue and cannot chew. Its digestive juices are so strong that it can digest a steel nail.
Most colours that we see are made as a combination of primary colours of light; Red, blue and Green. Since the colours that make up brown are far apart from each other on the rainbow they do not have a chance of mixing to make brown which is why it cannot be seen in a rainbow.
A rainbow is one of the most beautiful creations of nature. But Have you ever wondered why the colour brown which is seen everywhere in nature is not to be seen in rainbows?
Would you like to know how a match catches fire?When a match is struck on the striking surface of its box, the friction caused,produces enough heat to turn a very small amount of the red phosphorus in the match head into white phosphorus, which catches fire in air & starts a chemical reaction that produces oxygen gas. The heat and oxygen gas then cause the sulfur in the match to burst into a flame.
Did you know that plants can communicate with each other?
It is found that trees infested with insects produce an excess of chemicals in their leaves, that not only reduce the nutritional value of the leaves for the insects, but also warn neighboring trees. Following the warning, nearby trees will begin to produce the same chemicals, defending themselves from a similar attack.
Even though the sea appears blue,Seawater is relatively transparent, because of that, 5% of sunlight can penetrate clean ocean water to a depth of 262 feet (80 meters).
Light reflects upward both from the top of the oil film and from the underlying interface between the oil and the water; the distance from the reflection to your eye is slightly different depending on whether the returned light comes from the top or from the bottom of the oil film. This difference will cause an incident called interference where some colours are enhanced & others wiped out and make these puddles appear as a blend of colours
You must’ve seen beautiful bands of color appearing in the tiny oil slicks that form atop puddles on rainy days. What is the reason for this?
Smiling is easier than frowning. Out of the 60 muscles that are in your face,It takes only 20 muscles to smile and over 40 to frown.
All of the joints in our bodies are surrounded by a thick clear liquid. When you stretch your hands or legs, you’re causing the bones of the joint to pull apart. As they do, the tissue capsule that surrounds the joint is stretched Increasing its volume. As the volume increases its pressure is decreased. When the pressure of this fluid drops, gases dissolved in the fluid become less soluble, forming bubbles .When the joint is stretched far enough, the pressure in the capsule drops so low causing the bubbles to burst, producing the cracking sound.
Think of a time that you’ve stretched your hands or legs after staying in the same posture for some time. Do you remember how your joints produced a cracking sound? Do you know the reason for this?
I’m sure you have experienced the ‘cool’ sensation induced by eating mint at some time or another. This happens because of Menthol
which contains chemicals that have the ability to change the activity of the cell as if something cold came into contact with it.The cell interprets this change in its activity due to menthol as a change in temperature and sends that information to the brain .
Have you ever wondered why you don’t feel it when a leech bites you? A leech’s saliva contains
anesthetic compounds making you not feel it when it bites you.
Did you ever think that there is an amazing trick behind the two colours of a penguin? When a penguin swims, the penguins’ black backs help them blend into the dark ocean and save them from predators looking down from the above. The penguin’s white belly blends in against the light sky and snow and saves them from predators looking up from underwater.
In order to stand on one foot, your body needs to maintain its balance properly. You may have heard that our sense of balance is centered in our ears, but We also rely on our eyes for more fine-tuning of our balance..When your eyes are closed your brain does not receive enough information about your surrounding making it difficult for you to remain in that posture.