If two waves interact in destructive interference, which of the following will be true regarding the new wave formed? A. The new wave will produce a lower-pitched sound than the two original waves.

B. The new wave will produce a quieter sound than the two original waves.

C. The new wave will produce a higher-pitched sound than the two original waves.

D. The new wave will produce a louder sound than the two original waves.
Help plz

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90