The wavelength of visible light waves lies between 4 × 10–7 m to 8 × 10–7 m. The light waves travel with a very high speed of 3 × 108 m/s in vacuum. So a wave theory of light was accepted.Īccording to the wave theory, light consists of electromagnetic waves. This theory failed to explain the interference of light as well as the diffraction of light. Quantum optics: It deals with the interaction of light with the atomic entities of matter such as Photo Electric effect, atomic excitation etc.Īccording to Newton, light travels in space with a great speed as a stream of very small particles called corpuscles.Wave or physical optics: It is concerned with nature of light and deals with interference, diffraction and polarization.Geometrical optics or ray optics: It deals with the reflection or refraction of light.It is the branch of physics which deals with the study of light. The study of light is called optics and is classified in the following ways: four metals are fluid at room temperature or slightly above it.Light is a form of electromagnetic energy that causes the sensation of vision. Caesium has its melting point just above room temperature.There are also atomic clocks based on caesium known as caesium clocks which lose one second for every 100 million years.This also illustrates the fact that the element does not have any biological importance. Caesium is an element that is known for its non-harmful nature, especially to living species.The entire element is mainly discovered from the minerals like pollucite and lepidolite from the earth’s crust, that too, in the smaller quantities of around seven parts per million.It has a soft and delicate appearance with a silvery and golden cast on it. Caesium is an element that belongs to the group of alkali elements and has 55 as its atomic number.The manufacturing of the most accurate atomic clock, also known as the caesium clock, takes place with the help of caesium.As it helps in removing oxygen from the light bulbs and vacuum tubes. Caesium also has one of its applications in the manufacturing of optical glasses and other optical instruments.Since caesium has an extremely high density, it is widely used in caesium chloride, caesium sulphate and so on. Fields such as molecular biology are also known for using caesium.It is also used for converting heat energy into electrical energy through thermionic generators. ![]() Extractive oil industries are known for using caesium formate-based drilling fluids in their industrial processes.Caesium is mainly found in minerals like pollucite and lepidolite and occur in the environment through erosion and shrinking of rocks.Ĭaesium has multiple applications, some of these are mentioned below.Caesium is usually found in smaller quantities, that is around three to seven parts per million in the Earth's Crust.It is immediately attacked via air and is also known to respond violently to water. The gold cast of the caesium is its most reactive part.It has a silvery and golden appearance and is known to belong to the group of alkali metals. Caesium is an element that is known for its soft or delicate nature.Simultaneously, the boiling point of the Caesium is 1240 degrees Fahrenheit.Caesium has the melting point just above room temperature, that is, 83.3 degrees Fahrenheit.132.90 is an average mass or the atomic weight of the Caesium.This depicts the total number of electrons in this. Caesium is represented as Cs which is also its symbol.Some of the chemical properties of Caesium are tabulated below while others are enlisted. Read More: Periodic Classification of ElementsĬaesium has both chemical and physical properties. Usually, caesium is found in the minute quantities such as 7 parts per million in the resource-rich regions of the earth’s crust in minerals pollucite, rhodizite and lepidolite.Ĭaesium was discovered with the atomic number 55 and has its melting point just above the room temperature, that is, 28. In terms of its availability, it is found as half as abundant of lead and almost seventy times as abundant as silver. It is slightly silver in colour and is known for its golden cast which turns out to be one of its most reactive parts. Caesium is an element that is found in Group 1 of the periodic table is the group of alkali metals.
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