Identify the type of elecromagnetic waves,whose method of porduction is associated with
deay of atomic nulei.Also give the approximate range of wavelengths .

Identify the type of elecromagnetic waves,whose method of porduction is associated with a klystron valve,

Identify the type of elecromagnetic waves,whose method of porduction is associated with vibration of atoms and molecules and Also give the approximate range of wavelengths .

Identify the electromagnetic waves whose wavelength vary as 10^-3 Write one use of it.

Identify the electromagnetic waves whose wavelength vary as 10^-12 Write one use of it.

Name the part of electromagnetic spectrum,whose wavelength lies in the range of 10^(-10) m .Give its one use.

A particle is moving with a speed three times as that of an electron.If the ratio of de-Broglie wavelength of the wave associated with the particle to that with the electron is 1.813 xx 10^(-4) ,find the mass of hte particle.Can you identiify hte particle?Give that mass of the electron = 9.1 xx 01^(-31) kg.

Assume that the de Broglie wave associated with an electron can from a standing wave between the atom arrange in a one dimensional array with nodes at each of the atomic sites. It is found that one such standing wave if the distance d between the atoms of the array is 2 A^0 A similar standing wave is again formed if d is increased to 2.5overset @A . Find the energy of the electrons in electron volts and the least value of d for which the standing wave type described above can from .

A colloidal solution is a type of mixture which consists of particles whose size varies between 1 and 1000 nanometres. In colloidal solution the particles are distributed evenly. During this process the particles do not settle down. This is one of the best know thing about colloidal solutions. Properties of colloids and their variation are a well-known area ever since the primitive age. The best example to prove their familiarity with us is that we know from very early times that coagulation of milk results in the formation of curd. Physical properties of colloids 1. The nature of the colloidal solution is heterogeneous i.e. unlike. These solutions dwell with two different phases : • Dispersed medium Dispersed phase. 2. Despite the fact that colloidal dispersions are unlike in description (nature), yet the dispersed fragments are not detectabJe by the human eye. This is due to the microscopic size of the particles in the solution. 3. The colour of the colloidal dispersion is determined by particles in the solution based on their size. The wavelengths of light that is absorbed will be longer ifthe size of the particle is large. 4. As a result of its size, the colloidal fragments can easily be passed through a traditional filter paper. However, these particles can be filtered by using membranes such as animal, cellophane, and ultrafilters. Give the name of membrane used for filteration ?

An element A burns with golden flame in air. It reacts with another element B, atomic number 17 to give a product C. An aqueous a solution of product C on electrolysis gives a compound D and liberates hydrogen. Identify A,B,C or D. Also write down the equations for the reaction involved.