Passage VII

Radar observations of Saturn's moon Titan have revealed landforms that resemble longitudinal sand dunes found in some deserts on Earth. Such dunes are produced when sand-size solid particles are deposited in linear parallel piles (see Figure 1). Figure 2 shows the average dune spacing and average dune height for each of a number of areas of dunes on Titan and in 4 deserts on Earth (Deserts A-D). Figure 3 shows plots of the surface elevation (elevation above a horizontal reference plane) across a 25 km wide perpendicular cross section of dunes on Titan and in Desert A.

40. The 2 quantities for dunes that are defined in Figure 1－dune spacing and dune height—are directly analogous to which 2 quantities for electromagnetic waves?

Answer and Explanation

Your Answer is

Correct Answer is G

Explanation

General knowledge questions.

Looking at figure 1, it can be seen that dune spacing is the distance between two peaks, which conforms to the definition of wavelength wavelength; and dune height is the distance from the peak to the trough, which conforms to the definition of amplitude amplitude

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