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November 01, 2025, 09:45:38 am
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Author Topic: iTute 2010 Question  (Read 2378 times)  Share 

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kyzoo

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Re: iTute 2010 Question
« Reply #15 on: May 29, 2010, 06:06:58 pm »
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=/ I don't get how that explains the solution
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Akirus

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Re: iTute 2010 Question
« Reply #16 on: May 29, 2010, 07:41:03 pm »
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Quote from: googoo on May 29, 2010, 05:38:36 pm
Quote from: kyzoo on May 25, 2010, 12:19:36 am
Another question lol

Question 12 Which one or more of the above graphs best represent the signal in the fibre optic cable when the
signal generator is turned on?

Answer is B and D.

I thought that light intensity is the amplitude of the light wave? (So I chose A and B).

light intensity is proportional to amplitude^2

Okay, lets assume it is (although I have never heard that mentioned before); how is the signal in the optical fibre represented by the unmodulated waveform (D)?
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googoo

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Re: iTute 2010 Question
« Reply #17 on: May 29, 2010, 09:09:48 pm »
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light intensity cannot be negative
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tkjnz

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Re: iTute 2010 Question
« Reply #18 on: June 07, 2010, 02:52:48 am »
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anyone else think this exam was retarded?
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TrueTears

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Re: iTute 2010 Question
« Reply #19 on: June 07, 2010, 03:05:36 am »
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Quote from: googoo on May 29, 2010, 09:09:48 pm
light intensity cannot be negative
Actually they can, it's just definitions, conceptually it won't make sense.

Btw intensity is proportional to A^2 however i was told by my teacher that in vce physics we should just think of it as intensity is proportional to A, a few questions had that too back when i was doing vce physics.
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googoo

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Re: iTute 2010 Question
« Reply #20 on: June 07, 2010, 06:39:03 am »
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What acceptable definitions make light intensity a negative value? Conceptually, did you mean physically?
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