[单选题]
00.01: As a wave movn06l3b)di feb9ne h: eznh4bdj:) s4.s * amejes from one medium to a second medium with a different index of refraction which of z4j)snm*bjd:s4he a . the following wave properties would NEVER change?
A. frequency
B. wavelength
C. speed
D. angle
E. all will change
