Quick Quiz
What is Snell's law?
answer
n = c/v = sin i/sin r
by extension, n1sini = n2sinr, or
n2/n1 = sin i/sin r
What is the equation for the critical angle?
answer
sin critical angle = 1/n
What is the thin lens equation?
answer
1/f = 1/u + 1/v
Applies to curved mirrors as well.
What is lens power?
answer
1/f
where f is the focal length in m.
Lens power is measured in diopters.
What is the focal length of two lenses in contact?
answer
1/F = 1/f1 + 1/f2
What is the equation for the energy of a photon?
answer
E = hf
where h is Planck's constant and f is frequency.