Q 1. Why is Sky blue ? .........
A 1. Sunlight , which appears white to the human eyes , is a mixture of all the colors of the rainbow . When the sunlight passes through the atmosphere , it scatters and spreads into all the directions . The blue component of sunlight is scattered more strongly than any other component . That is why the sky appears blue .
Q 2 . What is Cosmic Light ?. ...
A 2. The Cosmic Microwave Background radiation , or CMB for short , is the faint glow of light that fills the universe . It is the afterglow of the big bang streaming through space these last 14 billion years . It is the oldest light we can see . The light is important in the study of cosmology because it carries the fingerprint of the universe as it was at the time of the birth .
Q 3 . Why can't you tickle yourself ? .....
A 3. The answer lies at the back of the brain in the area called the cerebellum , which is involved in monitoring movements . When you try to tickle yourself , the cerebellum predicts the sensation and this prediction is used to cancel the response of other brain areas to the tickle .
Q 4. What is SENSEX ? ......
A 4 . The commonly used name for the Bombay Stock Exchange Sensitive Index - an index composed of 30 of the largest and most actively traded stocks on the Bombay Stock Exchange (BSE) .
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