The V shaped waves produced by very small sources are also known as what 3 things?

The V shaped waves produced by very small sources are also known as what 3 things?

• A. Spherical waves; Diffraction patterns; Huygens wavelets
• B. Plane waves; Diffraction patterns; Huygens wavelets
• C. Spherical waves; Plane waves; Refraction
• D. Diffraction patterns; Huygens wavelets; Plane waves

Answer: (A)

A point-like source sends disturbances in every direction, so the wavefronts expand as spheres (in three dimensions) or circles in a cross-section. These are spherical waves. According to Huygens’ principle, every point on a wavefront becomes a new source of secondary wavelets, and the advancing front is the envelope of these Huygens wavelets. When those spherical wavefronts encounter edges or openings, they bend and interfere, producing diffraction patterns. So the V-shaped waves from a very small source are described as spherical waves, diffraction patterns, and Huygens wavelets. Plane waves or refraction don’t describe a tiny point source in free space, which is why those options aren’t correct.

A point-like source sends disturbances in every direction, so the wavefronts expand as spheres (in three dimensions) or circles in a cross-section. These are spherical waves. According to Huygens’ principle, every point on a wavefront becomes a new source of secondary wavelets, and the advancing front is the envelope of these Huygens wavelets. When those spherical wavefronts encounter edges or openings, they bend and interfere, producing diffraction patterns. So the V-shaped waves from a very small source are described as spherical waves, diffraction patterns, and Huygens wavelets. Plane waves or refraction don’t describe a tiny point source in free space, which is why those options aren’t correct.