If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Connection between relative and absolute refractive indices

You might need: Calculator

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
Stuck?
Stuck?