alleryThe Huygens principle states that every point of a wavefront acts as
AA source of new secondary spherical wavelets
BA mirror reflecting incident radiation
CA polariser filtering vibrations
DA monochromatic light source only
Answer & Solution
Correct answer: A. A source of new secondary spherical wavelets
1. Christiaan Huygens proposed the wave theory of light in 1678.
2. Every point on a wavefront acts as a source of secondary wavelets.
3. Envelope of secondary wavelets at a later instant gives the new wavefront.
4. This construction explains reflection, refraction and diffraction.
_Source: syllabus Physics, Ch 10 "Wave Optics", §10.2_
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