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  1. The waveform of a certain signal can be studied by

    2. A.

     Spectrometer
    B.

     Cathode ray oscilloscope
    C.

     P – n junction diode
    D.

     Sonometer

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    Answer : Option D

    Explanation :

    A spectrometer is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. Cathode ray oscilloscope is an electronic display device containing cathode-ray tube (CRT) that generates an electron beam that is used to produce visible patterns or graphs on a phosphorescent screen. A sonometer is an apparatus made of hollow box having two holes. A string is attached to it by which the transverse vibrations of strings can be studied.

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