First: I've found these questions (Here and Here) about this subject, but i don't think any of them will help me in this case since it was about measure it when you have a beam of light.
I'm looking for ways of determining the wavelength of a LED lamp, whose light disperses in all directions, and not in a "focused" way that can be pointed somewhere (to use other experimental procedures).
Is there a way of measuring it? I tought of measuring the frequency, and then determine the wavelength from it, but i also don't know how to measure frequency.
Question: How to measure wavelength or frequency of a light source that can't be pointed somewhere?
Answer
There are several ways. I would say the spectroscope is the easiest. They are about 7 dollars. Here's a photo of one. I took a pic of what you'll see inside too.
The numbers represent hundreds of nanometers, so a color that is under a 5 would have a wavelength of 500 nm. The photo doesn't quit represent the actual image. If you point the scope at your LED you can read its wavelength. Once you have the wavelength you can then calculate the frequency.
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