Radio broadcasts, infrared emission, sunshine, and dental x-rays are all

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BlackTom AI · Accepted Answer

The question asks about what unites radio broadcasts, infrared emission, sunshine, and dental x-rays in terms of the underlying physics.
Option 1: 'made by photons with different energies' correctly reflects the fact that these phenomena involve electromagnetic radiation spanning a spectrum of photon energies, from radio waves (low energy) to visible/infrared, up to higher-energy X-rays used in dental imaging. Each type of radiation corresponds to photons with characteristic energies, so this option aligns with fundamental concepts of photons and energy quantization.
Option 2: 'examples of processes that we simply cannot understand' is incorrect because these processes are well understood within electromagnetic theory, quantum physics, and practical imaging/communication technologies; labeling them as beyond understanding is misleading and unfounded.
Option 3: 'inventions of human civilization' is false from a physics perspective. While technologies (radio, X-ray imaging) are human-created, the statement ignores the physical basis of the radiation, reducing them to mere inventions rather than phenomena governed by photon energies and electromagnetic waves.
Option 4: 'easily detected by the human eye' is incorrect because only a narrow band of visible light is detectable by the eye; many of these phenomena involve wavelengths outside the visible range (radio, infrared, and X-rays) that are not perceivable by human vision without instruments.
Option 5: 'made by photons with the same energy' contradicts the reality that different regions of the electromagnetic spectrum are characterized by photons of different energies; radiative processes across radio to X-ray domains rely on photons with a range of energies, not a single energy value.

ASTRON 2140 AU2025 (23428) Final - 2025 Dec 12

Radio broadcasts, infrared emission, sunshine, and dental x-rays are all

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