photo voltaic systems

Photo Voltaic Cell..

Photo voltaic cell converts light energy into electrical energy. It acts as a cell. It consists of a metal layer of copper over which a semiconductor layer of cuprous oxide coated with a thing film of silver or gol..

The light energy of specific wavelengths is absorbed by chlorophylls and accessory pigments of PS-II. These pigments transfer their absorbed energy to PS-II reaction centre - P 6 8 0 (chlo 680). This centre become photo excited and exudes an electron with a gain of energy (23 K Cal/mol..

1. It can take part in electron transport system in both respiration and photosynthesis. 2. In photosynthesis the copper containing enzyme is plastocyanin. 3. It is the connecting link between photo system - I and ..

The heat and light energy emitted by the sun's radiation is called solar energy. Earth receives about 640 J of energy per second per square metre from the sun. The Sun's energy has two aspects. The 'heating effect' of sunlight, which is due to the infrared radiation present in the sun rays and the..

Suppose you are watching the lift off of a space-shuttle. You hear a deafening roar and see burning gases shooting from the exhaust vents of the rockets. At that moment, the space shuttle system moves slowly upward. You can infer that the force for the lift off comes from the burning gase..

. They are accessory pigments and harvest light from different regions of the spectrum. The light captured by these pigments are channelled it to the reaction centre, where light energy is converted into electrical energy. Conversion of Light into Electrical Ener..

Light - The effect of light on growth can be studied under 3 headings light intensity, light quality and duration of light. Growth is generally favoured by darkness, but light is indispensable because of its role in the manufacture of food. Young plants growing in the absence of light develop elong..

Improved yield Here the aim is to increase crop production. High yielding crops should be developed for this purpose. Better quality The public is aware and so it looks out for better quality crops. The quality would mean better size, colour, shape and taste. The health conscious public also w..

Light Phase consists of photochemical reactions which are carried out by two different photo systems, PS-I and PS-II. In the thylakoids, chlorophyll and other molecules are packed into units called photo systems. Each photosystem unit contains from 250 to 400..