What are the light intensities of each wavelength of sunlight?
jamie e asked:
I, like many others at the moment, have been set a peice of work to plan an investigation into how light intensity of a bulb emmitting similar light to sunlight (specialist bulb for growing plants) changes at its different wavelengths. I would very much appreciate it if someone could find for me a table or graph with a number of wavelengths in nm, and their corresponding intensities in kW/m2/s or similar, for sunlight. Also, if anyone has any more general tips for how to conduct the experiment, I would be very pleased to hear them. My plan so far is simply to use filters to get light of a specific wavelengths and then use a multimeter to measure the resistance of an LDR near to the light, as an indication of light intensity of that wavelength. Most important thing though, is to get a table/graph of some preknown values. Thanks very much.
I, like many others at the moment, have been set a peice of work to plan an investigation into how light intensity of a bulb emmitting similar light to sunlight (specialist bulb for growing plants) changes at its different wavelengths. I would very much appreciate it if someone could find for me a table or graph with a number of wavelengths in nm, and their corresponding intensities in kW/m2/s or similar, for sunlight. Also, if anyone has any more general tips for how to conduct the experiment, I would be very pleased to hear them. My plan so far is simply to use filters to get light of a specific wavelengths and then use a multimeter to measure the resistance of an LDR near to the light, as an indication of light intensity of that wavelength. Most important thing though, is to get a table/graph of some preknown values. Thanks very much.
one of them is going to be the dimmest and one is going to be the brightest! (more than likely anyway) [who] Paladin
I can’t help with a graph, but I have an interesting aspect of what you are looking for that may be of additional interest. Notice that moonlight is of a particular frequency. It is reflected light of the sun, which is why colors are not seen at night by moonlight. It would be interesting to know the frequency range of light coming from the moon that limits our sight to light and dark only.
Should you learn that, would you leave a message at “noddarc@yahoo.com ?” Thanks. [who] noddarc
You can find many graphs by a google images search for solar spectrum. [who] meg