V. Mathivanan

7 Questions 18 Answers 0 Followers

Questions related from V. Mathivanan

Light travels in straight line. This implies the Rectilinear Propagation of Light. Is it possible to bend a ray of light traveling in the same medium?

A light ray traveling from rarer to denser medium, bends towards the normal and a light ray traveling from denser to rarer medium bends away from the normal. Is it possible by any mechanism to...

09 September 2018 7,383 5 View

Why diamond is costlier than graphite even though both are made of carbon atoms?

A substance is made up of number of atoms. Both diamond and Graphite are made of carbon atoms. What makes diamond more special than graphite even though both have only carbon atoms?

09 September 2018 9,240 5 View

Why does electrical conductivity of alloys like constantan and manganin not change with respect to temperature?

The electrical conductivity of alloys like constantan and manganin doesn't change with respect to increase or decrease in temperature unlike conductors and semiconductors. What is the practical...

04 April 2013 9,448 4 View

Does magnetic susceptibility of organic compounds increase or decrease when doped with transition elements like copper and iron?

Magnetic susceptibility

11 November 2012 6,182 2 View

Can you suggest an easy method of synthesizing nanoparticles (aerogels or nanospheres) by sol-gel technique under normal laboratory conditions?

There are different ways of synthesizing nanoparticles Viz. chemical vapour deposition, Electrodeposition, Pulsed Laser deposition,Ball Milling,etc. But, I want to know a simple way of...

07 July 2012 491 5 View

Why in the case of alloys (such as constantan and manganin), does the resistance and resistivity practically remain the same with increase in temperature?

In metals, the conductivity increases with decrease in temperature and in semiconductors the conductivity increases with increase in temperature but why in alloys (constantan and manganin) the...

07 July 2012 545 3 View

Why the conductivity of Metal increase with decrease in temperature, semiconductor increase with increase in temperature and alloys remains same ?

Is it due to the following reasons? Metals : Due to the formation of more free electrons Semiconductors: Due to the formation of Cooper pairs and hence the creation of Phonon field Alloys: No Free...

07 July 2012 9,206 12 View