What is the vacuum impedance ?

Can I consider vacuum as a space free from em waves or gravity waves ? If not why such a space can't exist ? And what do we mean by electric impedance of vacuum to to 273 Ohm or something like...

05 June 2019 177 4 View

Does particle density increase at low temperature ?

When we cool down a room keeping the pressure same, the gas equations imply that particle density should increase. Does this happen and if so , does it affect our human system? Thanks in advance...

05 June 2019 7,040 2 View

Os there any geometrical representation of impedance of parallel L, C, R circuit ?

We know the complex plane representation of impedance of L,C,R. If there is a tank circuit, a capacitor in parallel with an L and R and that is connected with an a,c voltage source. Can we...

05 June 2019 1,040 1 View

What should be the thickness of antireflection coating ?

Coating is used for different purposes. When one face of beam splitter is coated with silver . Reflection of light guided by silver coating will face a pi phase differene or not ? Does this depend...

04 May 2019 5,092 6 View

What is the wavelength used for XRD ?

I am just entering into this subject . I have seen different XRD data without supplying the value of wavelength of X-RAY used . Is it that the value of wavelength is implied? One XRD machine...

04 May 2019 3,168 10 View

What is the theory of 2D XRD ?

As an optical grating , if we think a 2D lattice structure, then I thin Bragg's formula can not be used directly. May be I am wrong. I think in this way because in Bragg's formula "d" I'd there...

04 May 2019 9,090 1 View

Why EM waves are not deflected by Electric or magnetic fields ?

EM waves are basically vibrating electric and magnetic fields. So it seems that em waves should be deflected by Electric or magnetic fields . But I think it doesn't happen. Please explain the...

04 May 2019 4,487 6 View

Does dielectric discharge voltage depend on shape of the electrodes ?

Dielectric discharge voltage of air is 3 KV/ mm. So if two conducting plates are kept with a potential differene of 3kV and placed at a distance of one mm then air discharge will happen. If the...

04 May 2019 6,947 2 View

Why don't we use focusing lens for X-RAY diffraction ?

In Fraunhoffer diffraction we use optical lens for focussing the diffracted light to meet at different points of maxima or minima. For X-RAY diffraction we don't. ALSO FOR LASER DIFFRACTION WE...

04 May 2019 8,234 6 View

Why different XRD peaks have different intensities ?

In X-Ray diffraction a maximum occurs where all the scattering centres contribute constuctively . This comes from Laue equations. Still peaks are of different intensities. Can this intensity...

04 May 2019 4,144 21 View

After a reference from Int J Body Compos Res, can any body help?

Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...

03 March 2021 6,193 1 View

Can we block unwanted images during the x-ray prediction?

i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).

03 March 2021 7,100 1 View

What is the production process of CaFe ferroalloys?

I looking for ferro calcium production process

03 March 2021 1,755 4 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Why Trivalent chromium start precipitating above PH 5 ? Moreover discuss difference between adsorption of chromium and precipitation of chromium ?

I am a student of MS Environmental Engineering and started my research phase. I am working on metal removal ( chromium iii ) by using activated carbon prepared from the agricultural feedstock. So...

01 March 2021 5,475 2 View

Does anyone know to clarify these changes?

01 March 2021 1,290 2 View

Can water be extracted from Olivine?

I have always been interested in geology and wondered about how unique structures of materials behave in different circumstances. I stumbled upon Olivine, the magnesium iron silicate, and heard...

28 February 2021 7,330 4 View

Benefits of the 24 welled plate?

We have always used the 96 welled plate, the 48 welled plate but apparently there is much evidence on the 24 welled plate and above all its benefits.It states it is the same you would use on ELISA...

28 February 2021 1,149 1 View

In an eye with Tyndall, does each dot correspond to an individual cell?

When you observe the presence of Tyndall in an inflamed eye: Does each of the small floating dots correspond to an individual cell or to an aggregate of cells? Does a conventional slit lamp have...

27 February 2021 6,326 2 View

How to calculate the crystallinity of cellulose film?

27 February 2021 2,753 4 View