Laser ,Types and Use

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  LASER :-                    LASER is an acronym of  Light Amplification by stimulated emission of Radiation. It is an optical device which produces an intensive beam of highly coherent, Monochromatic light[ Electromagnetic radiation, especially visible radiation, of only one frequency or wavelength]. It can travel over great distance without spread.   LASER LIGHT :-                                   1. It is very different than normal light and contains only one specific wavelength of light.                                 2. A laser light has very tight beam and is very strong and concentrated.                                 3. A laser light can go to the moon and then come back to the earth without any appreciable change in intensity.                                  4. The light released is monochromatic (consists of only one wavelength) and coherent.  LIPS ( LASER Induced Plasma Spectroscopy) :- It is based on plasma formation on temperature basis, the material absorbs all th
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Evaporation in Daily Life

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We wear cotton clothes in Summer- We should wear cotton clothes in summer. this is because cotton being a good absorber provides more surface area for the evaporation of water. Since The energy required for evaporation is taken up from our body. That's why we feel relief and comfort in such clothes.

Water Droplets outside the glass container containing ice-cold water- We saw water droplets on the outer surface of a glass containing ice-cold water. This is because the water vapours present in the air when coming in contact with the glass of ice-cold water, lose their energy and get converted into liquid water which appears in the form of water droplets.

 After a hot sunny day, People sprinkle water on the roof- because of the high latent heat of the water helps to cool the hot surface. OR takes more heat from the surface of the roof to get vaporised.

 We feel cool When some nail polish remover or spirit is kept on our palm- It is due to the evaporation of remover or spirit which takes heat from our hand. And due to this, we feel cool on our skin.

 Water kept in Earth Pot cooler in Summer- 
                       - This is because tiny pores present at the surface of the weather pots, from which water is evaporated. The energy required for the evaporation is provided by the remaining water. Hence, its temperature goes and it becomes cool or stays cool during this process.

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