Exact(4)
Any object placed within a corner-cube reflector has seven reflections when viewed from the opposite corner (Fig. 1): three primary reflections (each reflected off one mirror), three secondary reflections (each reflected sequentially off two mirrors) and one tertiary reflection (reflected sequentially off all three mirrors).
As the eight images of the fly were not of equal intensity and had varying contrast with the background of the frame (e.g. the tertiary reflection was never as dark as the direct image), each image was analysed separately.
On the other hand, when a secondary reflection acts as the source for a tertiary reflection emerging in the direction of the primary reflection, the intensity can be modified by constructive or destructive interference.
If the secondary and tertiary scattering vectors sum to the primary scattering vector, the beam will be redirected by the tertiary reflection in the direction of and effect an intensity change at the detector.
Similar(56)
This is of course true of any object reflected in a plane mirror, and the same reasoning can therefore be extended to infer the apparent locations of the secondary and tertiary reflections.
So far we have looked at multiple scattering where the primary reflection is diffuse and is filtered by secondary and tertiary reflections resulting in relatively clean lines.
Second, the propensity of females versus males to enter traps is unknown and so we do not know if the census sex ratio is an unbiased reflection of the tertiary sex ratio.
By contrast, three reflections inside the drop produces the tertiary rainbow, which are much fainter and so rarely seen - and because those reflections take the light most of the way around the drop, it appears on the same side of the sky as the sun (this also makes it even harder to see).
Variability in operations and training amongst RECs is a reflection of apartheid entrenched influences in tertiary education in SA.
Variability in the operations and training needs of RECs is a reflection of apartheid-entrenched influences in tertiary education in SA.
Some of the treatment-related side effects reported by participants may have been a reflection of more intensive therapy administered in a tertiary care environment where complex cases are often seen.
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Justyna Jupowicz-Kozak
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