Answer:
The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object. Assuming no diffraction, for a collimated beam (such as a point source) of light, only the umbra is cast.
Explanation:
Answer:
Is it not the same structure of that of British architecture?
Explanation:
The architecture of the United Kingdom, or British architecture, consists of an eclectic combination of architectural styles, ranging from those that predate the creation of the United Kingdom, such as Roman, to 21st century contemporary.
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