Diffraction Grating with White Light Source

... Physics Laboratory Report The number and the name of the experiment: Experiment C3- Diffraction Grating with White Light Source The date of experiment:19 / 5 / 08 Objectives * Estimate the wavelength of the light using a diffraction grating * Measure the angle of diffraction by simple geometry * Measure the angle of diffraction by simple spectrometer * Learn the techniques in using a spectrometer Apparatus meter rule 2 set square(woodblock) 2 Clip 1 Diffraction grating(300 lines per mm) 1 ray box with vertical filament 1 12 V low voltage power supply 1 long pin 2 spectrometer 1 laboratory jack 1 color filter - red, green, blue 1 each sodium lamp(optional) 1 Theory In the visible wavelengths of the electromagnetic spectrum, red, with the longest wavelength, is diffracted most; and violet, with the shortest wavelength, is diffracted least. Because each color is diffracted a different amount, each color bends at a different angle. The result is a separation of white light into the seven major colors of the spectrum or rainbow. The diffraction grating consists of many narrow slits provided for the diffraction

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