What vibrates when electromagnetic waves travel through vacuum?
Correct answer: C. Electric and magnetic field
- A. Magnetic field
- B. Electric field
- C. Electric and magnetic field
- D. Gravitational field
Explanation
Electromagnetic waves are time‑varying electric and magnetic fields oscillating orthogonally and propagating through a vacuum without requiring material particles.
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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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