Electromagnetic waves are produced by:
Correct answer: D. Accelerated charges
- A. Accelerated bodies
- B. Heating a conductor
- C. Charges at rest or in uniform motion
- D. Accelerated charges
Explanation
Time‑varying (accelerated) charges produce varying electric and magnetic fields that radiate as electromagnetic waves; uniform motion or static charges do not radiate.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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