Abhivyakti

A rainbow is a multi-coloured arc that appears in the sky as a result of bending and scattering of sunlight through drops of rain. It occurs when it is raining in one part of the sky and sunny in another. A rainbow cannot be approached or physically touched. On ground, we only see a semi-circle or arc of rainbow, though it’s a full circle of light.  However, from height such as on an airplane, it can be seen in a complete circle. Due to its bow like shape and being formed mainly in rains, it is called as rainbow. Sir Isaac Newton explained how a rainbow forms. He identified 7 colours that make up white light of Sun. These 7 colours are Violet, Indigo, Blue, Green, Yellow, Orange and Red (VIBGYOR). All these colours are present in a rainbow in the order red, orange, yellow, green, blue, and indigo and violet. Normally when sunlight travels through the air we see white light. But when it enters through a raindrop, colours separate to make a rainbow at 42 degrees from the d...

Tommrow morning (of 22.07.2009) will witness the longest solar eclipse of this century. In India, this will start around 5:30 a.m. and will reach to totality around 6:30 a.m.. The total solar eclipse ( 3 min. 30 sec.) will be seen in a belt starting from western part of India to the distant north-east . This includes Surat, Vadodara, Indore, Bhopal, Varanasi, Patna, Darjeeling and Dibrugarh. In rest of India, it will be partially visible. Right now, I am in Mumbai (where % will be 96.6) and its raining here. So, in the early hours whether I will be able to see it, only clouds will tell. I am keeping my fingers crossed. However for online coverage, check on http://mashable.com/2009/07/21/solar-eclipse-online/ This eclipse will be the longest seen in India since Aug. 18, 1858 and the next big one will be on June 3, 2114. In this way, it is a once-in-the-life opportunity. Still today, there are many superstitions are associated with this normal celestial event, about which I have written...