Longer wavelengths will have frequencies, and shorter wavelengths will have frequencies.

Longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies.

Wavelength is the distance between two successive crests or trough in a waveform.

Wavelength is measured in meters, and the value can be obtained by diving the speed of the wave by its frequency.

Frequency is the number of cycles of a wave per unit time of motion.

Frequency, wavelength and velocity is related as shown below;

where;

From the relationship above, a longer wavelength will result in a lower frequency while a shorter wavelength will result in a higher frequency.

Thus, we can conclude that, longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies.

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d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day