Problem 16.28 A light wave has a 620 nm wavelength in air. Its wavelength in a transparent solid is 460 nm. Part A What is the speed of light in this solid? Express your answer with the appropriate units. ANSWER: U = Part B What is the light's frequency in the solid? Express your answer with the appropriate units. ANSWER: f = Problem 16.32 A loudspeaker at the origin emits a 110 Hz tone on a day when the speed of sound is 340 m/s. The phase difference between two points on the I- axis is 5.5 rad. Part A What is the distance between these two points? Express your answer with the appropriate units. ANSWER: Ar =