Question

Mention the two factors on which the Fresnel distance depends​

Answer 1

Answer:

The rings (shaded and non-shaded) are known as the Fresnel zones. The distance from T to a point on the circle to R is longer by some multiple of an half wavelength than the main beam. This difference in length is the cause of the Fresnel interference phenomenon.

Answer 2

The Fresnel distance is defined as the shortest distance traveled by a beam of light along a linear route before diffraction.

When the distance from the source to the obstruction or the distance from the obstruction to the screen is equivalent to the size of the obstacle, Fresnel diffraction occurs. Because of the comparable distances and diameters, the diffractive behavior is distinct.

The Fresnel distance is affected by the following factors:

1. The light source's wavelength
2. The distance between the source of light and the border
3. The distance between the border and the projected diffraction pattern on the screen.
4. The boundary's or obstruction's size, form, and character