A) Lycurgus cup
B) Medieval stained glass windows in churches
C) Damascus steel swords
D) All of the above
Correct Answer: A
Solution :
[a] The Lycurgus Cup is a 4th-century Roman glass cage cup made of a dichroic glass, which shows a different colour depending on whether or not light is passing through it; red when lit from behind and green when lit from in front. It is the only complete Roman glass object made from this type of glass, 121 and the one exhibiting the most impressive change in colour; it has been described as "the most spectacular glass of the period, fittingly decorated, which we know to have existed". The mystery wasn't solved until 1990, when researchers in England scrutinized broken fragments under a microscope and discovered that the Roman artisans were nanotechnology pioneers: They'd impregnated the glass with particles of silver and gold, ground down until they were as small as 50 nanometers in diameter, less than one-thousandth the size of a grain of table salt.
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