Raman Effect :
As name suggests it discovered C.V.Raman.
A discovery is recognizing something that already exists so here C.V.Raman recognized this Light effect by doing some experiments. He is the first one observed this type of light scattering through mirror/liquid/some chemical compound so they named this effect of light as Raman Effect.
Now will see what is this all about.
When ever you are reading something divide the topic into pieces. Before studying this Raman Effect you should know about some scientific terms.
Wave Length : Each light wave will have a wave length associated with for example visible lights will have a wave length of 400-700 nano meters. So human eye can see these lights in this following wave lengths.
( manam chuse prathi light ki oka wave length vuntundi telugu lo tharangadyrgyamu antam. ee wave length anedi nano meters lo kolustharu. kantiki kanipinche lights anni 400 nunchi 700 nanometers madyalo vuntayi. ante manam bayata chuse lights anninti wave lengths 400 nunchi 700nm varaku mathrame vuntayi. denikanna ekkuvina leka takkuvina mana eyes vatini chudalevu).
Molecules :
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
so here molecules are nothing but which are formed by collection of atoms. so each chemical compound you see or sense will have huge amount of molecules bound together.
Example : Consider water it will have two H and one O molecules.
Reflection : Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface.
Example : Just take a torch light and project light on a mirror you can see this reflection phenomenon . this same reflection will be used in our daily life to get light through ventilators or to see objects in mirror. There are somany ways we are using this reflection phenomenon in light.
This reflection reflects light into same medium. If you project light from air medium on to the mirror it will be reflected back to air medium.
Refraction : Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.
Example : Consider same example we used in reflection. Take a torch light project light in water. It will be refracted. In this case light will refracted from Air medium to water medium. thatch why we call this refraction as change in direction of wave or a wave passing from one medium to another medium.
Scattering : Scattering occurs when light or other energy waves pass through an imperfect medium (such as air filled with particles of some sort) and are deflected from a straight path.
Example : Just take a torch light and project on irregular surface. like ( Mirror coated with some liquid or water ) Or observe the rainbow it is formed by scattering phenomenon of light.
You may get feeling that why these guys explaining all this ___ instead of raman effect. If you read raman effect it is just a single paragraph. Books says Raman effect is a phenomenon bla bla bla ___ but understanding the actual concept like why they are using wave lengths , moelecules , chemical compounds, what is a light beam, What is meant by scattering of light,
Now read the RAMAN EFFECT definition. read it few times and understand the words.
Raman effect, change in the wavelength of light that occurs when a light beam is deflected by molecules. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman effect.
The Raman effect deals with scattering of light by molecules of a medium when they are excited to vibration energy levels.
As name suggests it discovered C.V.Raman.
A discovery is recognizing something that already exists so here C.V.Raman recognized this Light effect by doing some experiments. He is the first one observed this type of light scattering through mirror/liquid/some chemical compound so they named this effect of light as Raman Effect.
Now will see what is this all about.
 |
| Raman Effect |
When ever you are reading something divide the topic into pieces. Before studying this Raman Effect you should know about some scientific terms.
Wave Length : Each light wave will have a wave length associated with for example visible lights will have a wave length of 400-700 nano meters. So human eye can see these lights in this following wave lengths.
( manam chuse prathi light ki oka wave length vuntundi telugu lo tharangadyrgyamu antam. ee wave length anedi nano meters lo kolustharu. kantiki kanipinche lights anni 400 nunchi 700 nanometers madyalo vuntayi. ante manam bayata chuse lights anninti wave lengths 400 nunchi 700nm varaku mathrame vuntayi. denikanna ekkuvina leka takkuvina mana eyes vatini chudalevu).
Molecules :
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
so here molecules are nothing but which are formed by collection of atoms. so each chemical compound you see or sense will have huge amount of molecules bound together.
Example : Consider water it will have two H and one O molecules.
Reflection : Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface.
Example : Just take a torch light and project light on a mirror you can see this reflection phenomenon . this same reflection will be used in our daily life to get light through ventilators or to see objects in mirror. There are somany ways we are using this reflection phenomenon in light.
This reflection reflects light into same medium. If you project light from air medium on to the mirror it will be reflected back to air medium.
Refraction : Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.
Example : Consider same example we used in reflection. Take a torch light project light in water. It will be refracted. In this case light will refracted from Air medium to water medium. thatch why we call this refraction as change in direction of wave or a wave passing from one medium to another medium.
Scattering : Scattering occurs when light or other energy waves pass through an imperfect medium (such as air filled with particles of some sort) and are deflected from a straight path.
Example : Just take a torch light and project on irregular surface. like ( Mirror coated with some liquid or water ) Or observe the rainbow it is formed by scattering phenomenon of light.
You may get feeling that why these guys explaining all this ___ instead of raman effect. If you read raman effect it is just a single paragraph. Books says Raman effect is a phenomenon bla bla bla ___ but understanding the actual concept like why they are using wave lengths , moelecules , chemical compounds, what is a light beam, What is meant by scattering of light,
Now read the RAMAN EFFECT definition. read it few times and understand the words.
Raman effect, change in the wavelength of light that occurs when a light beam is deflected by molecules. When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman effect.
The Raman effect deals with scattering of light by molecules of a medium when they are excited to vibration energy levels.
Comments
Post a Comment