Quiz 03 PHY227 Modern Physics 27/04/2022 Part A Question # 01 Consider the following two normal modes of a stretched string fixed at the two ends. Carefully examine the following statements and choose the correct one. A The wavelengths of these modes varies with time. B. There is no normal mode exists between these two. C. There are possible normal modes which exist between these two. D. The sum of these modes also the solution of the wave equation which describes the mation of the string. (2 Points) $(x) = Sim (Ex) (x) - J (25x) n=1 L n=2 Anz Question # 02 The displacement of a wave traveling in the negative y-direction is D(y,t)=(15.2cm) sin(5.5y+72 t) where y is in m and t is in s. What are the (a) wavelength, and (b) speed of this wave?