Can the order of diffraction be different? And will it change the result? Can you provide an example?

Determine the absorbance of a solution that allows 73 units of light through from a light source that has an initial intensity of 254 units.

5. Find the measure of the angle of elevation of the sun when a boy 5 feet tall casts a shadow 5 feet long.

The diffraction of radiation can be used to determine the spacing between atoms. In practice, the wavelength of the radiation used should be restricted to a value which is of the same order of magnitude as the interatomic distances to be determined. Such experiments are commonly performed using X-rays (electromagnetic radiation), however a beam of subatomic particles, such as of neutrons or electrons, may also be used if their corresponding de Broglie wavelength is of the appropriate magnitude. Calculate the de Broglie wavelength of a neutron (mn = 1.67493×10-27 kg) moving at one six thousandth of the speed of light (c/6000). (Enter at least 4 significant figures.) The answer is not 0.79nm.