(a) What is the frequency of light with a 483 nm wavelength in air?
(b) What is its wavelength in glass with an index of refraction of 1.52?
(c) From the results of (a) and (b) find its speed in this glass.

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.