light electromagnetic spectrum

Fig: 3.8 - Electromagnetic spectrum It is interesting to note that visible light, which the human eye detects, constitutes only a small portion of the total electromagnetic spectrum. The visible spectrum is shown separately. Violet colour ..

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Atomic Structure..

Sun is the ultimate source of energy for organisms either directly or indirectly solar radiation before entering the atmosphere carries energy at a constant rate of 2 cal cm - 2 min - 1 , which is known as the solar constant. Solar spectrum is made up of short wave radiation, lig..

The Action Spectrum is the curve plotted on a graph paper representing the amount of oxygen evolved or the amount of carbon dioxide fixed or any other action of photosynthesis at different wavelengths of light. It has been observed that the photosynthesis occurs maximum in blue..

In 1856, James Clark Maxwell proposed that light and other forms of radiant energy propagate themselves in the form of waves, through space. These waves have electric and magnetic fields associated with them and are called electromagnetic waves or electromagnetic..

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..

An electromagnetic wave is a disturbance, which does not require any material medium for its propagation and can travel even through vacuum. They are caused due to varying electric and magnetic fields. Radio waves and light waves are examples for electromagnetic wave..

Electromagnetic Radiation and Energy(Planck's quantum theory) - In 1900, Max Planck presented the results of his famous black body radiation experiments, which showed that light has a dual character, behaving like a particle as well as a wave. He gave the Quantum Theory of Radia..

; in other words, these waves can pass through vacuum They require medium for propagation i.e. these waves cannot pass through vacuum All electromagnetic waves travel with the same velocity Matter waves travel with different velocities The velocity of all electromagnetic waves i..