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so i have to do this lab for ib physics and i am a noob at physics and i am having some trouble with the lab that i have to do.
the research question is "how does potential difference needed to operate an LED depend on the frequency of the light emitted?
it is set up in a circuit with a voltmeter to 6.0v, and a 220ohm resistor. there were 6 colors that i had to use, purple, blue, green, yellow, red and infrared.
i now have to potential for each of the 6 colors, and the teacher used his spectrometer to give us the wavelength and intensity of the light. the wavelength and intensity are just lots of data points, but when i graphed them, i noticed peaks following the colors of the rainbow but reversed. now my question to you guys is how do i find the frequency of the light wave?
the only equation he gave was e=hf, with e being energy, h is plank's constant, and f is frequency. but i still don't know what to do here. i need to find the frequency somehow.
cant find the frequency :(
Homework Statement
the research question is "how does potential difference needed to operate an LED depend on the frequency of the light emitted?
it is set up in a circuit with a voltmeter to 6.0v, and a 220ohm resistor. there were 6 colors that i had to use, purple, blue, green, yellow, red and infrared.
i now have to potential for each of the 6 colors, and the teacher used his spectrometer to give us the wavelength and intensity of the light. the wavelength and intensity are just lots of data points, but when i graphed them, i noticed peaks following the colors of the rainbow but reversed. now my question to you guys is how do i find the frequency of the light wave?
Homework Equations
the only equation he gave was e=hf, with e being energy, h is plank's constant, and f is frequency. but i still don't know what to do here. i need to find the frequency somehow.
The Attempt at a Solution
cant find the frequency :(