Interesting Information

During the day (daylight) the sky has a blue appearance because the Sun’s light (white light) is made up of rainbow of colors (red, orange, yellow, green, blue, indigo and violet) of different wavelength. This means, all these different colors of light combine to give you what is called white light (see diagram: refraction of sunlight). When sunlight enters the Earth’s atmosphere, it collides with air particles that causes the scattering of sunlight around the sky. The light with the shorter wavelength is scattered more by this collision than light with longer wavelengths. In this case, violet light is scattered the most, but human eyes do not see this color very well. However, since the human eyes are more sensitive to blue light (the next most scattered visible color), you will see the sky as blue. This therefore means that the blueness of the sky is from the blue light that is scattered from the sunlight in the atmosphere which, then enters our eyes from all regions of the sky.

To explain why the sky is blue we will need to take a quick look at the Sun and the atmosphere in understanding the role they play in the sky appearing blue. Light from the sun (sunlight) is composed of seven colors (rainbow colors) of different wavelength* that blend perfectly to make the sun’s light white in appearance. This light from the Sun is called white light. The different colors in sunlight (white light) can be seen by passing sunlight through a prism (see diagram below). When sunlight (white light) is allowed to pass through a prism, it scatters the different colors of light according to their wavelength, showing a continuous band of colors. This procedure exhibits the range (visible light spectrum) of colors - red, orange, yellow, green, blue, indigo, and violet in that order. This means that the different colors of light have different wavelengths in which red light has the longest wavelength and blue light found at the other end of the visible

Intrusting Information: Space Related Interesting Pictures : Most detailed image of the Crab Nebula This new Hubble image - One among the largest ever produced with the Earth-orbiting observator...

Most detailed image of the Crab Nebula This new Hubble image - One among the largest ever produced with the Earth-orbiting observatory - shows gives the most detailed view so far of the entire Crab Nebula ever made. The Crab is arguably the single most interesting object, as well as one of the most studied, in all of astronomy. The image is the largest image ever taken with Hubble's WFPC2 workhorse camera. The Crab Nebula is one of the most intricately structured and highly dynamical objects ever observed. The new Hubble image of the Crab was assembled from 24 individual exposures taken with the NASA/ESA Hubble Space Telescope and is the highest resolution image of the entire Crab Nebula ever made. Rose   This image of a pair of interacting galaxies called Arp 273 was released to celebrate the 21st anniversary of the launch of the NASA/ESA Hubble Space Telescope. The distorted shape of the larger of the two galaxies shows signs of tidal interactions wit

Maelifellssandur Mountainous countryside near Maelifellssandur, Myrdalsjökull Region, Iceland. Once the young lava fields of Iceland cool down, life begins anew little by little. Ice, wind and water flatten and carve out shapes to begin with, then, during the summer, bacteria, lichen and fungi prepare the soil for plants, in particular mosses which adapt to an environment which remains difficult. These plants colonise the most favourable sites and terrain little by little, forming a new ecosystem. This is a wide sand and gravel plain north of the glacier Myrdalsjokull. North of it is the mountainous and colorful rhyolite and high temperature area called Torfajokull. The plain lies about 600 m above sea level. It is rather flat and barren and during the melting season, when large parts of it are under water, the travellers have to be careful not to get bogged down in the quagmires. The plain was named after a low, free-standing mountain, Maelifell, on its eastern pa

 Afghanistan war Afghanistan war – In October 2001, the United States attacked Afghanistan as a starting chapter of the ‘War on terrorism’, which still continues today. The ultimate goal was to replace the Taliban government, and to find apparent 9/11 mastermind and Al-Qaeda member Osama Bin Laden. Many European countries assisted the US in what was called ‘Operation Enduring Freedom’. During the war, extensive damage was done to the environment, and many people suffered health effects from weapons applied to destroy enemy targets. It is estimated that ten thousand villages, and their surrounding environments were destroyed. Safe drinking water declined, because of a destruction of water infrastructure and resulting leaks, bacterial contamination and water theft. Rivers and groundwater were contaminated by poorly constructed landfills located near the sources. Afghanistan once consisted of major forests watered by monsoons. During the war, Taliban members illegally tradin

FAST FACTS Height: 5-14 ft at shoulders (males); females of all subspecies are smaller than males. Length: Up to 30 ft trunk to tail. Weight: 6,000-15,000 lbs (males). Lifespan Up to 70 years. There are two distinct species of elephants: the African elephant (genus: Loxodonta) and the Asian elephants (Elephas maximus). There are a number of differences between the two species – overall size, ear size, tusks and shape of the back and forehead among others. Loxodonta Elephas  Of these two species, African elephants are divided into two subspecies (savannah and forest), while the Asian elephant is divided into four subspecies (Sri Lankan, Indian, Sumatran and Borneo). Asian elephants have been very important to Asian culture for thousands of years – they have been domesticated and are used for religious festivals, transportation and to move heavy objects. Did You Know? Elephant ears are large, thin, and full of veins. This allows blood to circulate throu

The speed at which the Moon is moving away from Earth could affect life on the planet, but this could take billions of years to happen, writes space scientist Dr Maggie Aderin-Pocock. The Moon is not only beautiful, it is vital to our ecosystems and wildlife   It's easy to take the Moon for granted, even on a clear night when it can light up the sky. It really feels as if it has always been there just as it is now, throughout history. But that's not strictly true. It is thought that the Moon was formed when a proto-planet about the size of Mars collided with the early Earth around 4.5bn years ago. The debris left over from impact coalesced to form the Moon. Computer simulations of such an impact are consistent with the Earth Moon system we see in the 21st Century. The simulations also imply that at the time of its formation, the Moon sat much closer to the Earth - a mere 22,500km (14,000 miles) away, compared with the quarter of a million miles (402,336 km) bet

Top 10 intelligent people of the world Some people are born clever, but they are not good at learning, some appear to be dumb, but are the most intelligent ones with good learning power, here we’ll tell you about people, who are extra ordinary, who has the capability to learn more, and have the retaining power no one can ever think of. Kim Ung-Yong He is not the richest man of the world, but he lives in Korea, he went to university at the age of 4, completed the doctoral degree at the age of 15, he has the world’s highest IQ. Gregory Smith He was nominated for the Nobel prize at the age of 12. He was born in 1990 , he entered college at age 10 years. He is the founder of International Youth Advocates. Akrit Jaswal He is a 7 years old surgeon, he is an Indian and has the IQ of 146. He became a surgeon when he first treated a patient which was a 7 years old girl, they were poor and had not enough money to go to a doctor. He is studying Mathematics at th