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DP IB Physics: HL

Topic Questions

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4.3 Wave Characteristics

Question 1

Marks: 1

Wavefront diagrams can be used to indicate the frequency of waves. 

Which wave has the lowest frequency?

4-3-q1-sl-easy-mcq-phy

    Choose your answer
      
    Key Concepts
    Wavefronts

    Question 2

    Marks: 1

    Which of the following statements is the correct description of a ray?

    • The net displacement of a medium when two waves meet

    • A line that joins all the points on a wave that have the same phase

    • A line that indicates the direction of energy propagation

    • A line that indicates the plane of the oscillation of the electric field

    Choose your answer
      
    Key Concepts
    Wavefronts

    Question 3

    Marks: 1

    A spherical wave emitted from a point source has an intensity, I, at a distance, r.

    The relationship between intensity and the distance from the point source is given by

    Ifraction numerator P over denominator 4 straight pi r squared end fraction

    What is the intensity of the wave at a distance of 3r?

    • I over 3

    • I over 4

    • I over 9

    • 3 I

    Choose your answer
      
    Key Concepts
    Amplitude & Intensity

    Question 4

    Marks: 1

    Which phrase completes the following sentence about the relationship between the amplitude A and the intensity I of a wave?

    The intensity of a wave is:

    • Directly proportional to A

    • Directly proportional to A2

    • Inversely proportional to A

    • Inversely proportional to A2

    Choose your answer
      
    Key Concepts
    Amplitude & Intensity

    Question 5

    Marks: 1

    Which statement correctly describes the principal of superposition?

    • When two waves meet the resultant polarisation will be the sum of the individual polarisations

    • When two waves meet the resultant wavelength will be the sum of the individual wavelengths

    • When two waves meet the resultant intensity will be the sum of the individual intensities

    • When two waves meet the resultant displacement will be the sum of the individual displacements

    Choose your answer
      
    Key Concepts
    Superposition

    Question 6

    Marks: 1

    When two similar waves meet they superpose. 

    What is the correct resultant displacement for the superposition of the following waves?

    4-3-q6-image-sl-easy-mcq-phy

    4-3-q6-sl-easy-mcq-phy

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      Key Concepts
      Superposition

      Question 7

      Marks: 1

      Unpolarised light is passed through a polarising filter as shown in the diagram. 

      4-3-q7-sl-easy-mcq-phy-1

      Which arrow shows the correct plane of the resulting polarised light?

      4-3-q7-sl-easy-mcq-phy

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        Question 8

        Marks: 1

        Unpolarised light with intensity I0 is passed through a polarising filter. 

        Which expression shows the correct value of the resulting polarised light?

        • I0

        • 2I0

        • I subscript 0 over 2

        • I0 cos2θ

        Choose your answer
          
        Key Concepts
        Polarisation

        Question 9

        Marks: 1

        A physicist passes unpolarised light through a polariser and then an analyser as shown. 

        4-3-q9-sl-easy-mcq-phy

        Which analyser does the physicist need to use so that the intensity of the analysed light is equal to the intensity of the polarised light?

        4-3-q9-sl-easy-mcq-phy-1

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          Key Concepts
          Malus's Law

          Question 10

          Marks: 1

          Which law determines the intensity of analysed light?

          • Hooke's Law

          • Snell's Law

          • Hubble's Law

          • Malus's Law

          Choose your answer
            
          Key Concepts
          Malus's Law