He clasped his hands behind his head, giving her an unobstructed view of his body.
He tried to shift Destiny so that he had an unobstructed view of Lori.
When the secondary wave of least retardation is unobstructed, or when a ray passes through the point under consideration.
According to the undulatory theory the light cannot be regarded strictly as travelling along a ray; but the existence of an unobstructed ray implies that the system of Fresnel's zones can be commenced, and, if a large number of these zones are fully developed and do not terminate abruptly, the illumination is unaffected by the neighbourhood of obstacles.
Whether it was the cutting edge or the back of a razor - made no material difference, and was thus led to the conclusion that the explanation of these phenomena requires nothing more than the application of Huygens's principle to the unobstructed parts of the wave.
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