Voltage is defined as the ______________ per unit ______________. ...

[Bob-Dole]

Voltage is defined as the ______________ per unit ______________.
 a. charge; current
  b. work; current
  c. charge; work
  d. work; charge

Question 2

Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength  = 550 nm, a wavelength which is near the middle of the visual spectrum.

[diana chang]

Answer to Question 1

d

Answer to Question 2

99.6 nm