1. (5 pt) Consider a 1D harmonic wave in a string that is moving in the + x-direction. It has a wavelength of 10.0 cm, an amplitude of 1 .70 cm and a period of 0.100 s (a) What is the wavespeed ot the wave? {b} Suppose that at t=0, the piece we designate as x=0 is at a height of 0.10 cm and moving upward. Find the equation of the wave, including the phase (c) Use your answer to part b to find the position of a piece of string at x = 20.0 cm at t = 0.50 s. 2. (3 pt) Consider the BCIT radio station, CFML-Flvl, 10?.9 {a} What is the wavelength of the radio waves? (b) You put a radio receiver within the radio station's range, but inside a room, with an open door to the outside. Would the radio waves bend around the doorto reach the receiver? Would light waves? Explain what comparison you are making to decide your answer 3. (6 pt) A beam of light is approaching the interface between water (n=1.333) and glass (n=1.490) from the glass side, with an angle of to the normal of 22.0'. (a) Sketch the wavefronts as they approach the interface, and the wavefronts of the refracted and reflected waves (b) Find the angle of the refracted light (c) Find the critical angle at the interface (d) The frequency of the light is 411.0 THz, and the speed of light in vacuum is 3.00x108 m/s. Find the wavelengths of the light, both in glass and in water