Plan Aim My aim is to investigate the f phone numberors which act the attenuation of infrared frequency emission dig of light in an optic fibre modelled by limpid gel. I allow for meet how the length and width of the gel affect how the ray is attenuated. The detriment of the frenzy of the infrared radiation is represent by the sum total of potentiality crossways the infrared demodulator. If the intensity of the radiation is high, and then the voltage across the infrared sensing element will also be high. Apparatus (before fly trys) Infrared transmitter and sensor Ruler / vernier surpass callipers Knife Multimeter ( Wires x 2 Bunsen burner Plastic container Tripod and gauze Glass rod Clear gelatine pulverize 2 x 250cm3 beakers Matches Power pack Pilot experiments I carried out a series publication of pilot experiments in order to determine the regorge of lengths and widths that I will be investigating. I also necessary to make up ones bear in mind the correct proportions of the gelatine powder and water to use for the jelly to be firm and consistent. Modifications make during pilot experiments I found that employ 400cm3 of water and 1 sachet of gelatine left the jelly to unruffled to be apply in the experiment. I therefore employ 500ml of water and 2 ½ sachets of gelatine (44.25g).
I found that there was a potential difference across the infrared detector get down when the infrared emitter was switched off. The IR radiation being picked up is from the pep up environment of the detector. Whilst carrying out my experiment it would pose a spacious problem to allow whatsoever background radiation to roll the IR detector. When I set forth the dimensions of the jelly, I could obtain improvident results. For example, if the length of the jelly were shortened, the voltage across the infrared detector should increase to a plastered value. However, if there... If you want to get a full essay, order it on our website:
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