**Part B**. Two of the types of infrared light, IR-C and IR-A, are both components of sunlight. Their wavelengths range from 3000 to 1,000,000 nm for IR-C and from 700 to 1400 nm for IR-A. Compare the energy of microwaves, IR-C, and IR-A.

**Rank from greatest to least energy per photon. To rank items as equivalent, overlap them.**

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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