Question
Consider the following waves representing electromagnetic radiation. In the original diagram, two waves a and b fill the same 1.6 × 10⁻³ m horizontal span: a completes four cycles, b completes eight cycles. Which wave has the longer wavelength? Calculate the wavelength of each. Which wave has the higher frequency and larger photon energy? Calculate these values. Which wave has the faster velocity? What type of electromagnetic radiation is illustrated?
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Evidence boundary
The four and eight cycles and 1.6 × 10⁻³ m span are read from the cited diagram. The computed values assume propagation in vacuum. Broad spectrum labels overlap near the submillimeter boundary; the source textbook's chart groups these wavelengths with microwaves.