Answer: Night vision cameras, TV remotes, and detecting heat sources.
- A Night vision cameras, TV remotes, and detecting heat sources
- B Mainly long-range radio broadcast communications as widely reported
- C Medical X-ray imaging of bones and dense tissue in standard practice
- D Mainly visible-light photography applications under most conditions encountered
Correct answer: A. Night vision cameras, TV remotes, and detecting heat sources
Explanation: IR applications: remote controls, night vision, thermal imaging, IR spectroscopy, heating, fiber optic communications (near IR), and detecting warm objects in the dark.
In an electromagnetic wave, the oscillating electric field (E) and magnetic field (B) are perpendicular to each other and to the direction the wave travels - a purely transverse wave that needs no medium, unlike sound.
Concept context
Maxwell's equations, EM spectrum, properties, and applications of each band.