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Test # 226


1.
Which of the following dates was observed as International Level Crossing Awareness Day (ILCAD) by the Indian Railways in collaboration with the U.I.C. (International Union Of Railways)?

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Annually, an Australian eats 15 kg of bananas, which comes out to 27 meters of bananas      .. More >>

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  • Simple Science

    Chandelier Crystals and Prisms

    Refraction:
    When a ray of light passes through plane glass, like a window pane, it is shifted somewhat, but its direction does not change; that is, the emergent ray is parallel to the incident ray. But when a beam of light passes through a triangular glass prism, such as a chandelier crystal, its direction is greatly changed, and an object viewed through a prism is seen quite out of its true position.

    Whenever light passes through a prism, it is bent toward the base of the prism, or toward the thick portion of the prism, and emerges from the prism in quite a different direction from that in which it entered. Hence, when an object is looked at through a prism, it is seen quite out of place. In Figure, the candle seems to be at S, while in reality it is at A.

    FIG. - When looked at through the prism, A seems to be at S.


    Chourishi Systems