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, n, start subscript, start text, T, E, end text, end subscript, equals, 1, point, 86, and
  • germanium with respect to titanium dioxide, n, start subscript, start text, G, T, end text, end subscript, equals, 1, point, 54.
What is the relative refractive index, n, start subscript, start text, G, E, end text, end subscript, of germanium with respect to ethanol?
Note: Write the answer correct up to two decimal places.
n, start subscript, start text, G, E, end text, end subscript, equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
Stuck?
Stuck?