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Imagine a grating with infinite number of periodsslits, and the periodspacing D between slits is larger than the wavelength so that there are high order diffractions. In each of the diffraction directiondirections the wavewaves constructively interfere, but what decides the percentage of power that goes into each order? 

My thinking is that each gratingslit is a Huygens source, radiating spherical wave, goingcylindrical waves homogeneously in every direction, but due to interference, only those with constructive interference can exist, so. I guess the energy going into each order should be equal, which is not the case. So I am confused on how the light will distribute its energy to different orders. Thank you.

Imagine a grating with infinite number of periods, and the period D is larger than the wavelength so that there are high order diffractions. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? My thinking is that each grating is a Huygens source, radiating spherical wave, going homogeneously in every direction, but due to interference, only those with constructive interference can exist, so I guess the energy into each order should be equal, which is not the case. So I am confused on how the light will distribute its energy to different orders. Thank you.

Imagine a grating with infinite number of slits, and the spacing D between slits is larger than the wavelength so that there are high order diffractions. In each of the diffraction directions the waves constructively interfere, but what decides the percentage of power that goes into each order? 

My thinking is that each slit is a Huygens source, radiating cylindrical waves homogeneously in every direction, but due to interference, only those with constructive interference can exist. I guess the energy going into each order should be equal, which is not the case. So I am confused on how the light will distribute its energy to different orders. Thank you.

3 added 49 characters in body
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Imagine a grating with infinite number of periods, and the period D is larger than the wavelength so that there are high order diffractions. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? My thinking is that each grating is a Huygens source, radiating spherical wave, going homogeneously in every direction, but due to interference, only those with constructive interference can exist, so I guess the energy into each order should be equal, which is not the case. So I am confused on how the light will distribute its energy to different orders. Thank you.

Imagine a grating with infinite number of periods, and the period D is larger than the wavelength so that there are high order diffractions. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? Thank you.

Imagine a grating with infinite number of periods, and the period D is larger than the wavelength so that there are high order diffractions. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? My thinking is that each grating is a Huygens source, radiating spherical wave, going homogeneously in every direction, but due to interference, only those with constructive interference can exist, so I guess the energy into each order should be equal, which is not the case. So I am confused on how the light will distribute its energy to different orders. Thank you.

2 added 49 characters in body
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Imagine a grating with infinite number of periods, and D>lambdathe period D is larger than the wavelength so that there are high order diffractions, in. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? Thank you.

Imagine a grating with infinite periods, and D>lambda so there are high order diffractions, in each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? Thank you.

Imagine a grating with infinite number of periods, and the period D is larger than the wavelength so that there are high order diffractions. In each of the diffraction direction the wave constructively interfere, but what decides the percentage of power that goes into each order? Thank you.

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