प्रोपेगेशन हिंदी उपयोग और उदाहरण

"" प्रजनन/फ़ैलाव, पौध-पूर्व तैयारी (प्रोपेगेशन, प्री-प्लांट प्रीपेरेशन) और स्टोक के प्रकार ।

प्रजनन/फ़ैलाव, पौध-पूर्व तैयारी (प्रोपेगेशन, प्री-प्लांट प्रीपेरेशन) और स्टोक के प्रकार ।

सोसाइटी फ़ार द प्रोपेगेशन ऑव द गास्पेल (एस.पी.जी.-संस्थापित सन् १७०१ ई.), चर्च मिशनरी सोसाइटी (सी.एम.एस.-संस्थापित सन् १७९९ ई.)।

प्रोपेगेशन इसके अंग्रेजी अर्थ का उदाहरण

According to the user manual for the Zemax optical design software, the correct approximation for propagation in the near field follows the angular spectrum method.

This propagation regime satisfies \ F \gg 1.

The correct approximation for the propagation in the near field is Fresnel diffraction.

This propagation regime verifies \ F \sim 1.

Finally, once at the observation point the distance to the aperture is much bigger than the aperture size, propagation becomes well described by Fraunhofer diffraction.

This propagation regime verifies \ F \ll 1.

This criterion, firstly described by and now adopted in propagation codes like, allows one to determine the realm of application of near and far field approximations taking into account the actual wavefront surface shape at the observation point, to sample its phase without aliasing.

This criterion is named Gaussian pilot beam and fixes the best propagation method (among angular spectrum, Fresnel and Fraunhofer diffraction) by looking at the behavior of a Gaussian beam.

Near/far field approximations are fixed by the analytical calculation of the Gaussian beam Rayleigh length and by its comparison with the input/output propagation distance.

If the ratio between input/output propagation distance and Rayleigh length returns \le 1 the surface wavefront maintains itself nearly flat along its path, which means that no sampling rescaling is requested for the phase measurement.

In this case the beam is said to be near field at the observation point and angular spectrum method is adopted for the propagation.

At contrary, once the ratio between input/output propagation distance and Gaussian pilot beam Rayleigh range returns > 1 the surface wavefront gets curvature along the path.

The beam is said to be far field at the observation point and Fresnel diffraction is adopted for the propagation.