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    I need to design a practical. "How does the wavelength of light affect the voltage produced by a solar cell?"

    My teacher told me to find filter paper, but I don't know what he means. Can anyone suggest some apparatus to control the wavelegth of light reaching the solar cell?
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    Colour filters. you know, like coloured pieces of plastic in front of a lamp :smile:
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    They're these little, flat plastic things with the wavelength written on them. That's pretty much the only way I know how to do that practical.
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    Alright, I didn't think it would be that simple =) Thanks
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    You could always move the lamp away from the cell really quickly [/joke]
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    (Original post by DarthBrini)
    Alright, I didn't think it would be that simple =) Thanks
    never, EVER say that about a physics practical!
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    Didn't filters will only let certain wavelenghts through. use this method.
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    Another way would be to use different coloured LEDs, they tend to produce much better monochromatic light than a filter can produce.
    Just make sure you check the voltage of each LED when wiring them up
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    (Original post by Mehh)
    Another way would be to use different coloured LEDs, they tend to produce much better monochromatic light than a filter can produce.
    Just make sure you check the voltage of each LED when wiring them up
    The number of LEDs I've blown up... it's not even funny.

    It's true that coloured filters don't let through monochromatic light. You can get hold of a spectrum profile for each filter; you'll probably find a window of about 50nm around the value stated.
 
 
 
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