Nature of an electron Coursework Example | Topics and Well Written Essays - 2250 words

Nature of an electron - Coursework ExampleThis is described in a classical wave role model of watery which states that slack properties that argon similar to any wave. For instance, set down experiences reflection and refraction in the same manner that any other wave would experience interference. In addition, white experiences the Doppler effect the same way any other wave would experience Doppler effect. However, the prediction of the quantum model shows that frequency or wavelength of the incident of the incident light only affects the photoelectric current. where E- is the energy that the quantum light produces, Kmax is the maximal kinetic energy of the photoelectrom emitted , where as Wo is the work function of the of the energy needed to innitiate the emision of photoelectrons from the metal surface. In an prove to demonstrate the photoelectric effect, the following apparatus are required a digital voltmeter to be apply to ginmill the reverse voltage reading, a photo s emiconductor diode connected with an amplifier, monochromatic light source to produce light beams to irradiate the photo cathode, and a filter to neutrally vary the intensity of light. Generally the quantization energy of the electromagnetic radiation in light is given in the relation, where the radiation energy, is a constant known as the Planks constant and is given as (6.63?10-34Js), and - is the frequency of the light incident energy. The robustness of the equation is based on the photoelectric effect investigate. There are four aspects that need to be taken into consideration when conducting the photoelectric effect experiment. These facts include the lower limit frequency when the frequency of the incident light is less than the minimum frequency required, no photoelectrons can be emitted despite the intensity of the light. The value of minimum frequency varies from metal to metal. Secondly, as the frequency of the incident light increases, the kinetic energy of the photoele ctrons increases. However, the intensity of the light is independent of the kinetic energy of the electron emitted. And lastly, the emission of photons is effectively instantaneous. (physics 242 laboratory manual) The photoelectric effect experiment consists if a high intensity lamb, a phototube, and batteries. The photodiode tube is the central element of the apparatus. The window in the diode gives way for light into the tube to the clean metal surface at the cathode. The diode is completely evacuated to forfend any collision of air molecules and the electrons. When beams of light hit the surface of the metal plate at the cathode, electrons are emitted by the metal plate. The photodiode has an in-built capacitance developing a voltage during the charging process by the electrons emitted. When the stopping electric potential of the cathode is reached, the difference in voltage across the two poles, that is, cathode and anode stabilizes. A very sensitive amplifier is used to measu re the stopping potential. The amplifier aids in the establishment of the small number of photoelectrons emitted. A voltmeter is used to measure the payoff voltage of the between the batteries and the output ground terminals. A number of different monochromatic light beams are used for the experiment. A glass tube consisting of atomic number 80 vapor produces light when discharged electrically. The glasses roll filters out the ultraviolet light that can be harmful. The mercury light produces five thin phantasmal lines that are yellow, green blue, violet, and ultraviolet in the visible region. These lines can be spatially separated by diffraction. The wavelength desired is selected using a collimator, and the intensity of the selected wavelength is varied using a density filter The mercury lamb is switched on. On the front reflective mask of the lamb box, yellow, green, and tiny rays of blue