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To investigate and demonstrate how the different wavelengths of red and blue light differ by finding their focal lengths using a converging lens.
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Physics Coursework Aim To investigate and demonstrate how the different wavelengths of red and blue light differ by finding their focal lengths using a converging lens. Apparatus * Red and Blue LED's (light emitting diodes) * Wires to connect apparatus together * Power supply and mains access to control voltage supplied to the LED's * Ruler in cm and mm * Converging lens * Blocks to adjust height of components Safety This experiment is relatively safe and there are few hazards. However I will be aware throughout the experiment of the electrical components thus minimising any risk of electric shock. Although LED's them selves do not get sufficiently hot enough to burn skin the wires may get quite hot if the current passing through them is high enough. If I conduct the experiment with a high voltage not only may the LED's fuse, the brightness of them may harm my eyes if they are looked at continuously. To reduce this effect...
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