Define barrier layer cells (photocells), Biology

Assignment Help:

Define Barrier layer cells (photocells)

They are the very simple of the detectors. It contains the bottom support layer of conductive metal like iron. A photosensitive layer of the selenium /cadmium (the positive electrode) rest on the top of the metal support. This light sensitive materials is covered along with a transparent thin layer of gold (the negative electrode). Light passing by the transparent layer to the selenium, causes the release of electrons from selenium. These emitted electrons move to the clear conductive layer and make a weak electric current as they complete a circuit by flowing to the metal support. So the current produced is a direction function of the light intensity striking the photocell.


Related Discussions:- Define barrier layer cells (photocells)

Management of gout, Q. Management of Gout? The goals of therapy or mana...

Q. Management of Gout? The goals of therapy or management of gout is based on the following aspects: • early resolution of inflammation, • prevention of recurrent attac

Explain properties of natural fats and oils, Explain Properties of Natural ...

Explain Properties of Natural fats and oils Natural fats and oils vary widely in their physical properties even though they are composed of the same or similar fatty acids. Th

Define the lens transparency in metabolism of lens, Define the lens transpa...

Define the lens transparency in metabolism of lens. Lens Transparency: a. Transparency depends on avoidance of large transitions of refractory index. This is in other wor

Circulatory systems in animals, Circulatory Systems in Animals In anim...

Circulatory Systems in Animals In animals that have efficient circulatory systems and readily permeable vascular skins, gas exchange occurs through the integument. Thus we fin

Isomerization of dihydroxyacetone phosphate, Isomerization of dihydroxyacet...

Isomerization of dihydroxyacetone phosphate Isomerization  of  dihydroxyacetone phosphate: Triosephosphate isomerase interconverts  dihydroxyacetone phosphate and  glyceralde

Population distribution, Population Distribution - Population Parameters an...

Population Distribution - Population Parameters and Regulation Dispersion or distribution refers to the pattern of distribution of individuals of a population. As shown in Fig

Totipotency and pluripotency, Totipotency and Pluripotency In the sta...

Totipotency and Pluripotency In the starting we said that the fertilized egg cell (zygote) has the capacity or potentiality to give rise to all kinds of cell types, like a bl

Define the working of ph meter, Define the working of pH Meter? The pH ...

Define the working of pH Meter? The pH of a solution, we know, measures the degree of acidity or alkalinity relative to the ionization of water sample. A pH meter is a sophisti

Excretory system - urinary bladder, URINARY BLADDER - Pear shaped sac l...

URINARY BLADDER - Pear shaped sac like. Situated in pelvic region of abdominal cavity. Ventrally placed. Lined by transitional epithelum. Detrusor muscle i.e. to expell out

Hygroscopic coeflicient-retention of soil moisture, Hygroscopic Coeflicient...

Hygroscopic Coeflicient To have a more complete picture of soil moisture relations, let us take a soil sample and oven dry it for 24 hours at 11 o C. Now if this soil is kept i

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd