effects light transmission

The history of the fax machine begins in 1843 in England with Alexander Bain. He devised an apparatus made up of two pens connected to two pendulums. He joined the two together with a wire, and was able to reproduce writing onto an electrically conductive surface. Some years later, in 1862, Italia..

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 manufactu..

Electromagnetic theory of light was put forward by James Clerk Maxwell in 1873. According to this theory, light consists of fluctuating electric and magnetic fields propagating in the form of electromagnetic waves. But this theory failed to explain the photoelectric effecth..

If q is the angle between the plane of transmission of the analyzer and the polarizer, then intensity of the transmitted light I is where I o is intensity of light transmitted from polarize..

is the fluctuation in signal strength at a receiver and may be rapid or slow, general or frequency-selective. In each case it is due to interference between two waves, which left the same source but arrived at the destination by different paths. The fluctuation is more likely with smaller waveleng..

Role of Growth Regulators In Seed Dormancy - Gibberellins have been shown to be effective in breaking the dormancy in potato tubers and in tree buds in winter. Cytokinins have been found to be effective in breaking the dormancy of seeds. They also promote the germination of the ..

As light is transverse in character, all directions of vibrations of electric vector in the unpolarised light are confined to the XY plane. While looking along the X axis, vibrations of electric vector parallel to Y axis are seen and similarly along y axis. Hence light..

The Photoelectric Effect - When light of sufficiently small wavelength is incident on a metal surface, electrons are ejected from the metal. This phenomenon is called as 'photoelectric effect' and the ejected electrons are called as 'photoelectrons..

Question: Explain the principle underlying the working of a solar cell. Answer: Solar cell is a device which directly converts solar energy into electrical energy. This principle is based on the phenomenon of photovoltaic effect. The Phenomenon due to which light ener..

Hormones are the chemical messengers of the body. They are defined as organic substances secreted into blood stream to control the metabolic and biological activities. These hormones are involved in transmission of information from one tissue to another and from cell to cell. These substa..