Reflection loss and refractive index

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SUMMARY

The discussion focuses on calculating the reflection loss when radiant energy passes through an empty quartz cell, with a refractive index of quartz set at 1.55. The formula used for reflection loss is I/I_i = ((n2-n1) / (n2+n1))^2. The initial calculation yielded a reflection loss of 4.7%, but the correct answer is 17.3%. The discrepancy arises from misunderstanding the number of interfaces the light interacts with as it passes through the quartz.

PREREQUISITES
  • Understanding of refractive index and its implications in optics
  • Familiarity with the formula for reflection loss
  • Basic knowledge of light behavior at material interfaces
  • Experience with quartz properties in optical applications
NEXT STEPS
  • Study the principles of light refraction and reflection at interfaces
  • Learn about the optical properties of quartz and its applications
  • Explore advanced optics concepts such as Fresnel equations
  • Investigate the impact of multiple reflections in optical systems
USEFUL FOR

Students in physics or engineering, optical engineers, and anyone involved in the study of light behavior in materials will benefit from this discussion.

Puchinita5
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Homework Statement



"Calculate the reflection loss when a beam of radiant energy passes through an empty quartz cell assuming the refractive index of quartz is 1.55"

Homework Equations



I/I_i = ((n2-n1) / (n2+n1))^2

The Attempt at a Solution

I'm taking the refractive index through the empty cell to be 1 (is that right?)I/I_i = ((n2-n1) / (n2+n1))^2
= ((1.55-1)/(1.55+1))^2 = 0.047 or 4.7%

The answer in the back of the book is 17.3 %

what am i doing wrong?
 
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If the light is passing through the quartz, how many times does it get refracted?

You are right in assuming the refractive index inside is 1.
 

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