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...

08 September 2018 7,313 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?

08 September 2018 9,158 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...

03 April 2013 9,354 4 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...

06 July 2012 421 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...

06 July 2012 9,130 12 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...

06 July 2012 408 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View