used lighting systems

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 gro..

. The sum of the two sine waves This can be put in a more useful form by using the relation for the sum of two cosines from trigonometry: is the modulation functions or "envelope" (the outer curve in the above figure). In this case, the modulation function happens to b..

takes place only in the presence of sunlight. In this reaction, the light energy from the sun is absorbed by the photosynthetic pigments and is used to break down the water molecules. This is called the photolysis ('photo' is light and 'lysis' refers to break down) o..

It is so called as it takes place only in the presence of sunlight and hence is a light-dependent reaction. Robin Hill, an English biochemist conducted studies on isolated chloroplasts to understand the mechanism of light reactions. Hence, it is also called Hill's reaction. Dur..

When light passes through a substance or gas, a part of it is absorbed and the rest scattered away. The basic process in scattering is absorption of light by the molecules followed by re-radiation in different directions. The strength of scattering can be measured by the loss of..

There are many reactions, which are influenced by light. For example., photosynthesis and photography. Such reactions are known as photochemical reactions. Other examples are: Light supplies the necessary energy for the reaction to take place. Photographic films which a..

. These bands are called interference fringes. The solid arcs represent the crests and the dotted arcs represent the troughs in the above diagram. When these arcs overlap, the (.) dots represent the maximum intensity i.e., constructive interference, whereas the (x) crosses represent the minimum int..

1. Calcium oxide is used in preparing slaked lime, milk of lime, limewater, lime mortar etc. 2. It is used in cement and glass industry. 3. Used as drying agent for gases and even liquids. 4. Used to make soda lime. It is obtained by treating quicklime with a..

Plants vary greatly in response to light with respect to seed germination. Seeds which respond to light for their germination are named as photoblastic . Non-photoblastic seeds germinate irrespective of the presence or absence of light. For the light sensitiv..

Summary - Light is a form of energy which can be reflected either by a plane mirror or spherical mirror. Depending upon the type of mirror used for reflection of light the use of reflecting surface also varie..