infrared radiations

Question: Though a hot iron emits radiations, it is not visible to us. Why? Answer: It emits infra-red radiations which are invisible to the eye..

Green house gases in the atmosphere behave much like the glass panes in a green house. Green houses are like small glass houses whose transparent glass roof and walls allow sunrays to pass through. It keeps the heat from escaping, thus allowing vegetables and flowers to grow even in cold weather. ..

The different types of electromagnetic radiations in the increasing order of wavelengths are, gamma rays ( g ), X-rays, ultra-violet rays (U.V.), visible radiation, infrared radiation (IR), microwaves and radio wave..

The solar spectrum of electromagnetic waves include energy packed heat generating waves called radiation waves. As they lie beyond red colour waves of visible spectrum, they are also called 'infra-red rays'. These infrared rays lie in the wave length range of 700..

Man Made Green House Effect - Normal green house effect was principally dominated by H 2 O (vapour), CO 2 and O 3 the interception of infrared radiation by these gases was in the wavelength ranges as given below: Water vapour - 6 - 25 m m CO 2 - 13 - 17 m m O 3 - 9 - 10 m m Huma..

Ozone Layer - As mentioned before, the natural ozone layer of the atmosphere is very significant because it protect us from harmful effects of infrared/U.V. radiations of the sun. The atmosphere consists of different layers namely troposphere, stratosphere, mesosphere and thermo..

Green house is usually a type of glasshouse used for raising tender plants. Air inside the green house is usually warmer than the outside, though it receives less solar radiation due to the carbon dioxide present inside, produced by plants (by respiration). This is called 'green house eff..

A solar cooker contains a wooden box having thermocol lining from inside. A box made aluminium is placed inside the wooden box. The inner side of the aluminium box is painted black. The top is closed by a glass sheet. A plane mirror is fixed to the hinged lid. The box is closed such that the inner ..

While all electromagnetic waves travel at the same speed (i.e., velocity 'c' is constant), the type of their radiation differs in the duration of wavelength and consequently their frequencies. An electromagnetic radiation with a long wavelength will have a low frequency and v..

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 p..