**Part A**. A microwave oven operates at 2.80 GHz. What is the wavelength of the radiation produced by this appliance?

**Express the wavelength numerically in nanometers.**

Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength (λ) and frequency (ν) are related according to the equation:

c=λ×ν

where c is the speed of light (3.00 × 10^{8} m/s). The energy (E in joules) contained in one quantum of electromagnetic radiation is described by the equation:

E=h×ν

where h is Planck's constant (6.626 × 10^{−34} J•s). Note that frequency has units of inverse seconds (s^{−1}), which are more commonly expressed as hertz (Hz).

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