ANALYSIS OF COPPER IN BRASS BY UV - VISIBLE SPECTROSCOPY
NAME: EDWARD AFUTU INDEX NO: 8030212 EXPERIMENT: I.2.2.2. DEMONSTRATOR: MISS NAOMI KABIRI DATE: 21-01-14
ANALYSIS OF COPPER IN BRASS BY UV – VISIBLE SPECTROSCOPY
AIMS/OBJECTIVES;
To determine the percentage of copper in brass by UV-visible spectroscopy.
INTRODUCTION
Electromagnetic radiation, of which ultraviolet and visible light are but two examples, has properties of both waves and particles. When light acts as a particle, called a photon, each light particle possesses a discrete amount of energy called a quantum.
When a molecule is exposed to electromagnetic energy it can absorb a photon, increasing its energy by an amount equal to the energy of the photon. The energy of the absorbed photon can be calculated if the frequency, ν, (the symbol, ν, is a Greek letter, pronounced nu) of the light is known according to Equation 1. E = hν Equation 1
Where h is a constant known as Planck’s constant after Max Planck, the German scientist who first proposed it. Planck’s constant has a value of 6.63 X 10-34 J. s . Frequency is measured in units of 1/s or Hertz (Hz). The frequency of a light wave is inversely proportional to its wavelength, λ, (λ is
ANALYSIS OF COPPER IN BRASS BY UV – VISIBLE SPECTROSCOPY
AIMS/OBJECTIVES;
To determine the percentage of copper in brass by UV-visible spectroscopy.
INTRODUCTION
Electromagnetic radiation, of which ultraviolet and visible light are but two examples, has properties of both waves and particles. When light acts as a particle, called a photon, each light particle possesses a discrete amount of energy called a quantum.
When a molecule is exposed to electromagnetic energy it can absorb a photon, increasing its energy by an amount equal to the energy of the photon. The energy of the absorbed photon can be calculated if the frequency, ν, (the symbol, ν, is a Greek letter, pronounced nu) of the light is known according to Equation 1. E = hν Equation 1
Where h is a constant known as Planck’s constant after Max Planck, the German scientist who first proposed it. Planck’s constant has a value of 6.63 X 10-34 J. s . Frequency is measured in units of 1/s or Hertz (Hz). The frequency of a light wave is inversely proportional to its wavelength, λ, (λ is