The direction of secondary wavefronts from point sources is perpendicular to the wavefronts themselves. This means that the secondary wavefronts will spread out in all directions away from the point source.
Point sources affect the direction of secondary wavefronts by emitting waves in all directions at the same time. This creates a spherical pattern of wavefronts around the point source, with the direction of the wavefronts perpendicular to the surface of the sphere.
Yes, all point sources emit secondary wavefronts. This is because point sources are defined as single points in space that emit waves in all directions.
Yes, the direction of secondary wavefronts can change if the medium through which the wave is traveling changes. For example, if the wave enters a different density medium, the direction of the wavefronts may bend or change direction.
The direction of secondary wavefronts from point sources can be measured using a variety of techniques such as interferometry or diffraction patterns. These techniques involve measuring the changes in the wavefronts as they travel through a medium and using mathematical calculations to determine their direction.