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optical prism

n.
1.optical device having a triangular shape and made of glass or quartz

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Word of the Day

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  • optical phenomenon
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  • optical opacity
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  • optical maser
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  • optical lens
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  • optical instrument
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  • optical illusion
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  • optical glass
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  • optical fusion
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  • optical flint
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  • optical fibre
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  • optical pyrometer
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  • optical telescope
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  • optically
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  • optician
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  • optics
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  • optimal
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  • optimally
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  • optimisation
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  • optimise
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  • optimism
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  • persona
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  • unmercifulness
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  • ad hoc
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  • marburg hemorrhagic fever
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  • pipeline company
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  • frenziedly
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  • screwy
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  • isthmus of suez
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  • sleeping draught
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  • infrared ray
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    Idiom of the Day

    second-rate
    to be not of the best quality
    The performance of the school choir was second-rate.



    1.
    S1: Man has existed for about a million years.
    S6: What its future effects will be is a matter. of conjecture, but possibly a study of its effects hitherto may make the conjecture a little less hazardous.

    P: Science' as a dominant factor in determining the beliefs of educated men, has existed for about 300 years; as a source of economic technique, for about 150 years.
    Q: When we consider how recently it has risen to power, we find ourselves forced to believe that we are at the very beginning of its work in transforming human life.
    R: In this brief period it has proved itself an incredibly powerful revolutionary force.
    S: He has possessed writing for about 6,000 years, agriculture somewhat longer, but perhaps not much longer.

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    The world's tallest mountains, the Himalayas, are also the fastest growing. Their growth about half an inch a year is caused by the pressure exerted by two of Earth's continental plates (the Eurasian plate and the Indo-Australian plate) pushing against one another.      .. More >>
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