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

Nature of an electron - Coursework ExampleThis is described in a classical motion model of light which states that light properties that are similar to any wrap. For instance, light experiences reflection and refraction in the same manner that any other wave would experience interference. In addition, light experiences the Doppler effect the same way any other wave would experience Doppler effect. However, the prediction of the quantum model shows that frequence or wavelength of the nonessential of the incident light only affects the photoelectric current. where E- is the nothing that the quantum light produces, Kmax is the maximum 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 alloy surface. In an experiment to demonstrate the photoelectric effect, the following apparatus are required a digital voltmeter to be used to measure the reverse potential drop reading, a ph oto junction rectifier connected with an amplifier, monochromatic light source to produce light beams to irradiate the photo cathode, and a filter to neutrally vary the tawdriness of light. Generally the quantization energy of the electromagnetic radiation in light is given in the relation, where the radiation energy, is a everlasting known as the Planks constant and is given as (6.63?10-34Js), and - is the frequency of the light incident energy. The validity of the equation is based on the photoelectric effect experiment. There are quatern aspects that need to be taken into consideration when conducting the photoelectric effect experiment. These facts include the minimum 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 pho toelectrons 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 avoid 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 content developing a voltage during the charging process by the electrons emitted. When the stopping potential of the cathode is reached, the difference in voltage across the two poles, that is, cathode and anode stabilizes. A very slender amplifier is used to measure the stopp ing potential. The amplifier aids in the establishment of the small number of photoelectrons emitted. A voltmeter is used to measure the yield 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 mercury vapor produces light when accomplish electrically. The glasses envelop filters out the ultraviolet light light that can be harmful. The mercury light produces five thin spectral 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 assiduousness filter The mercury lamb is switched on. On the front reflective mask of the lamb box, yellow, green, and tiny rays of blue