What is Fresnel distance?

What is Fresnel's distance? Obtain the equation for Fresnel's distance.

What is Fresnel's distance ?

What is the Fresnel distance for an aperture of 3 mm and wavelength 400 nm?

What is Fresnel diffraction?

Light of wavelength 5,500 Å is illuminated on a slit. Calculate the slit width if Fresnel distance for diffraction set-up is 4 m.

Explain the importance of Fresnel distance.

Calculate Fresnel distance for aperture of 1mm using Red light of wavelength 7000Å.

Calculate Fresnel distance for aperture of 1mm using Red light of wavelength 7000Å.