Dancehall And Crime Essay

394 WordsNov 23, 20092 Pages
Diffraction Grating Group 2 Members; ID# Dwayne Williams 0901509 Aeon Forbes 0804118 Lecture: Miss Nelson Experiment Number: 7 Experiment Date: October, 27, 2009 Experiment Title: Diffraction Grating Aim: To observe the mercury spectrum and to use the wavelength corresponding to the observed lines to calculate the spacing of the grating. Apparatus: Spectrometer; Telescope, Collimator, Grating, Prism, table and Mercury lamp. Diagram: [pic] Results: Table showing wavelength and angle for first and second order colours. Order |Colour |Type |Left |Right |Total angle |[pic]/m |sin( | | First Order | Violet | Moderate | 0 | 14.3 | 14.3 | 405 | | | | Violet | Weak | 14.0 | 14.4 | 14.2 | 408 | | | | Violet | Strong | 14.1 | 15.5 | 14.8 | 436 | | | | Blue Green | Weak | 17.0 | 17.5 | 17 | 492 | | | | Green | Strong | 19.0 | 19.5 | 19.3 | 546 | | | | Yellow | Strong | 20.1 | 20.8 | 20.5 | 577 | | | Second Order | Violet | Weak | 28.6 | 32.5 | 30.6 | 816 | | | | Violet | Strong | 31 | 0 | 31 | 872 | | | | Blue Green | Weak | 0 | 42.7 | 42.7 | 984 | | | | Green | Strong | 40.0 | 0 | 42.7 | 1092 | | | | Yellow | Strong | 42.1 | 0 | 42.1 | 1154 | | | | Yellow | Strong | 42.9 | 46.1 | 44.5 | 1158 | | | Discussion; Diffraction Grating can be defined as an optical device used to obtain the different wavelengths or colors contained in a beam of light. The device usually consists of thousands of narrow, closely spaced parallel slits, from which light is propagated and different colours that contain in the light are observed. Visible light

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