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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-18

  • question_answer
    A substance which radiates light when heated to a high temperature is said to be

    A)  Luminescent     

    B)  Incandescent

    C)  Fluorescent       

    D)  Phosphorescent

    Correct Answer: B

    Solution :

    An incandescent light or light source is any device that uses electricity to heat a filament or wire until it is hot enough to glow white. If that was done in the open air, in the presence of oxygen, the metal filament would burn up before it got that hot.


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