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two rays of different wavelength will generate the same electric current ?

two rays of different wavelength will generate the same electric current ? - Physics Forum

two rays of different wavelength will generate the same electric current ? - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.


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Old 09-22-2006, 10:15 AM
laura
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Default two rays of different wavelength will generate the same electric current ?




Hi,

I have 2 different light rays which have different wavelengths (for
instance one is red and the other is green).

I'm sending these rays to 2 photodiodes.

Is the electric current generated by those photodiodes the same? Are
there any differences (power, intensity) ?


thanks,
laura

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Old 09-22-2006, 11:32 AM
Greg Neill
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Default two rays of different wavelength will generate the same electric current ?

"laura" <[Only registered users see links. ]> wrote in message
news:1158920147.060438.139980@d34g2000cwd.googlegr oups.com...

1. Photodiodes have different sensitivities (efficiencies)
at different wavelengths.

2. Photons of different wavelengths have different amounts
of energy.

3. Intensity depends upon the *number* of photons involved,
not just the energy per photon.

Now, given the above, what do you think?


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