Huygen's principle is used to:
Correct answer: C. Locate the wave front
- A. Find index of refraction
- B. Explain polarisation
- C. Locate the wave front
- D. Determine the speed of light
Explanation
Huygen's principle states that every point on a wavefront can be considered as a source of secondary wavelets that spread out in all directions. These secondary wavelets combine to form the new wavefront. Therefore, it is used to locate the wavefront. The other options are incorrect because they do not align with the purpose of Huygen's principle.
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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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