A jeweler wishes to show off the intrinsic brilliance of their prize diamond by giving it an antireflective coating for light of wavelength 591 nm in air. What is the minimum thickness the jeweler needs for a coating material with an index of refraction of 1.41 ? The index of refraction of diamond is 2.41 .

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.