Huygen's principle states that:
Correct answer: C. All points on primary wave front are source of secondary wavelets
- A. Light travels in straight line
- B. Light travels in electromagnetic waves
- C. All points on primary wave front are source of secondary wavelets
- D. Light has dual nature
Explanation
Huygen's principle states that all points on the primary wavefront are sources of secondary wavelets that spread out in all directions. This explains how light waves propagate through a medium by considering each point on a wavefront as a source of spherical wavelets. The other options are incorrect as they do not directly relate to the principle of wave behavior discussed in 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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