Samares Kar

11 Questions 98 Answers 0 Followers

Questions related from Samares Kar

Why are rain-bearing monsoon clouds in India different shades of black and grey?

Some monsoon clouds in India - Cirrus, Cumulus, etc. - are white because of Mie scattering. But the rain-bearing monsoon clouds - Cumulonimbus, Nimbostratus - are dark (different shades of black...

02 February 2015 2,432 3 View

What is the primary reason for diamond having so many unique properties?

Diamond has not just one but many truly unique properties, which include the following: (1) It is the most covalent of all solids; (2) It is the only semiconductor with nearly equal electron and...

02 February 2015 1,171 3 View

Why in semiconductor crystals smaller lattice constant translates into larger band-gaps?

Consider the following semiconductors with the zinc blende (tetrahedral) crystal structure: BN, InP, InSb, with band-gaps of 6.10, 1.27, and 0.18 eV, respectively; and lattice constants of 0.362,...

02 February 2015 6,663 9 View

Is ionic bond in a crystal stronger or weaker than the covalent bond?

Consider GaAs (covalent crystal) and NaCl (ionic crystal); both have nearly same lattice constant. The Ga-As interatomic distance is shorter than the Na-Cl interatomic distance; but GaAs has a...

02 February 2015 3,580 10 View

Will there be more light in a room with four 35 W CFL on, if we open four windows placed centrally in the walls on a sunlit day?

Consider the room to be a 15 feet X 15 feet square with 10 feet high ceiling. The four windows are centrally placed in the walls of size 3 feet X 4 feet, and all are exposed to sunlight.

01 January 2015 5,794 4 View

What could be the main reasons for slow broadband internet in India?

Try as hard as you can, but, you will never get clean and honest answers from the service providers. Are transmission towers one main problem? Poor and ill-maintained servers another? Could high...

01 January 2015 9,874 0 View

Why in all the living beings of nature, the flow of food material is unidirectional? Is not an alternative flow possible?

Beginning with the jelly fish, which is among the earliest living organisms, up to the human species, the flow of food material inside the organism is unidirectional. Why has evolution not seen an...

01 January 2015 1,670 1 View

Should a conference insist on a short manuscript from each presenter for its proceedings?

Some authors of conference (or symposium) papers decline to submit a manuscript for various reasons. These include lack of time on their part, lack of visibility of conference proceedings...

12 December 2014 1,272 1 View

Is there any source of energy which is clean?

The renewable sources of energy, e.g. solar electric, solar thermal, wind, etc., are renewable, but, all of these degrade the environment, and their ecological effects are negative and still to be...

12 December 2014 400 1 View

What could be the most effective medicine against self-plagiarism and what should be the threshold for defining self-plagiarism?

Most journals, if not all, profess by the Bible to be against self-plagiarism; yet this curse continues unabated and many authors (in particular, many who have already hundreds of publications)...

11 November 2014 697 1 View

What should be the h-index and impact factor of the n-th author of a paper with more than 3 authors if n is larger than 3?

Papers are mushrooming with ever increasing number of authors. It is not known what scientific meaning the position of the n-th author has, if any? Often authors are added to compensate for their...

11 November 2014 7,169 1 View