The light used in optical fiber transmission is________?
Correct answer: B. Monochromatic
- A. Dichromatic
- B. Monochromatic
- C. Pentachromatic
- D. None of these
Explanation
A laser source is commonly used in optical-fibre communication because its nearly single-wavelength light suffers less spreading and allows efficient signal transmission, so it is considered monochromatic. The likely mistake is choosing dichromatic, which means light containing two wavelengths rather than the approximately one wavelength used here.
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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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