Given: width of aperture `d=3mm` and `lambda=500nm`. For what distance ray optics is a good approximation?

An aperture of size a is illuninated by a parallel beam of light of wavelength gamma . The distance at which ray optics has a good approximation is

For an aperture of 2mm and wavelength of 500 nm , Fresnel distance is

The distance upto which ray optics holds good is called

The distance upto which ray optics holds good is called

Light of wavelength 5000Å is diffrated by an aperture of width 2mm . For what distance by the diffracted beam does the spreading due to diffraction become greater than the width of the aperture ?

Estimate the distance for which for which ray optics is good approximation for an aperture of 4 mm and wavelength 400 nm .

The width of an aperture is 4 mm and wavelength of light illuminating it is 600 nm. Find the distance up to which ray optics is valid.

In YDSE, D = 1 m, d = 1 mm , and lambda = 5000 nm . The distance of the 100th maxima from the central maxima is