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Course: Class 12 Physics (India) > Unit 9

Lesson 3: Refraction at plane surfaces
Science
Class 12 Physics (India)
Ray optics and optical instruments
Refraction at plane surfaces
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Connection between relative and absolute refractive indices

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Problem

The relative refractive index of...
  • titanium dioxide with respect to ethanol, nTE=1.86, and
  • germanium with respect to titanium dioxide, nGT=1.54.
What is the relative refractive index, nGE, of germanium with respect to ethanol?
Note: Write the answer correct up to two decimal places.
nGE=
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi