Energy of incident of light to amplitude of light?

  • Thread starter chewchun
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  • #1
chewchun
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Homework Statement


A sheet of glass transmit 70% of the energy of the incident light
What is the value of the quantity: (Amplitude of transmitted light) / (Amplitude of incident light)
A:0.49
B:0.70
C:0.84
D:1.19


Homework Equations


Intensity is proportional to amplitude square.



The Attempt at a Solution


I tried relating to the above equation but i got 0.7^2/1^2=0.49 (A) but answer is not A...
 

Answers and Replies

  • #2
Doc Al
Mentor
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1,907
I tried relating to the above equation but i got 0.7^2/1^2=0.49 (A) but answer is not A...
Why did you square the ratio of intensities?
 

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