A plane sound wave in air at 20°C, with wavelength 589 mm, is incident on a smooth surface of water at 25°C at an angle of incidence of 12.3°. (a) Determine the angle of refraction for the sound wave. „(b).Determine. the wavelength of the sound in water. Enter a number with units. A narrow beam of sodium yellow light, with wavelength 589 nm in vacuum, is incident from air onto a smooth water surface at an angle of incidence of 12.3°. (c) Determine the angle of refraction. (d) Determine the wavelength of the light in water.

Ch. 34

de, [rad'um] is needed to reflect beam on 2.8 degree from metasurface, which is printed on a dielectric substrate and placed in the air, What value of the phase shift derivative where the incideat angle of radiation is zero and wavelength is 1.55 um. ,-15

When a CD is held at an angle, the reflected light containsmany colors. What causes these colors?(a) An anti-theft encoding intended to prevent copying ofthe CD.(b) The different colors correspond to different data bits.(c) Light reflected from the closely spaced grooves addsconstructively for different wavelengths at differentangles.(d) It is part of the decorative label on the CD.