Recent content by ATH500

It's a red LED input flashing at 100Hz. And when the receptor perceives light from the LED, it drops in voltage and we can see the effect on the oscilloscope. The LED correspond to the yellow graph and the receptor to the blue graph. I wonder if the impurities or the total internal reflection in...

Are you sure that's how it works ? I thought that the refraction index took care of all this and that it already take in account the interactions inside the same material. Because my optical fiber is made of the same material all along it must the refraction index should not change because every...

So, does anyone else have any other ideas about this ?

I did an experiment on the speed of light with different length of optical fibers. I know that the fiber has a refraction index of 1.49. I would like to know if I need to take in account the total internal reflection of the optical fibers too. Because when I use long fibers like for exemple...

Thanks for your answer, I have access to all the equipment I need to measure the speed of light with an oscilloscope. I'll use two LEDS connected to fiber optics cable of different length and generate two squared signal using a photodiode connected to a circuit and the oscilloscope. Thank you ...

Hello, I would like to know different ways to measure the speed of light. It's for one of my project. I would like to know if there are simple ways to do it. I already know that we can measure the speed of light using a microwave...