Chapter 3, Problem 5CHQ

Interpretation Introduction

Interpretation: The metal identification from the color of flame should be identified.

Concept Introduction:Emission spectra is given by an atom of an element when it absorbs enough energy, by means of heat, electric current etc. so that valence electrons in its shell gets excited and jumps to a higher level from its initial lower level. When it comes back to lower level, the electron loses the energy in the form of radiation. The energy so liberated has a particular wavelength corresponding to which the color of the wave is determined.

There are two types of emission spectra- continuous and discrete emission spectra.
Prism and diffraction grating are used to see the mixture of colors in light.
A diffraction grating is a device that deflects light through an angle that depends on the wavelength of the light. Light falls on the grating surface with different colors at a certain angle.
This creates diffraction pattern with all the different colors other than yellow, orange and blue comprising the light, scattered at different angles.