0%

DP IB Physics: HL

Topic Questions

Home / IB / Physics: HL / DP / Topic Questions / 4. Waves / 4.4 Wave Behaviour / Structured Questions


4.4 Wave Behaviour

Question 1a

Marks: 2
(a)
State what is meant by:
 
(i)
The law of reflection.
[1]
(ii)
Refraction.
[1]
    Assess your score
      

    Question 1b

    Marks: 2

    The following diagram shows an incident ray perpendicular to the boundary between two media.

    4-4-1b-question-stem-sl-sq-easy-phy

    (b)
    Complete the ray diagram by drawing the transmitted ray.
    [2]
      Assess your score
        

      Question 1c

      Marks: 2

      Ray diagrams can be used to show reflection and refraction. The following diagram shows the reflection of light on a smooth surface.

      4-4-1c-question-stem-sl-sq-easy-phy

      (c)
      On the ray diagram label:
       
      (i)
      The incident ray.
      [1]
      (ii)
      The reflected ray.
      [1]
        Assess your score
          
        Key Concepts
        Reflection

        Question 1d

        Marks: 3

        The ray diagram shows an incident ray on a plane mirror.

        4-4-1d-question-stem-sl-sq-easy-phy

        (d)
        Calculate the angle of reflection.
        [3]
          Assess your score
            
          Key Concepts
          Reflection

          Question 2a

          Marks: 2

          Refraction occurs when light travels between media with different optical densities.

          (a)
          Describe what happens when light passes from a less dense medium into a more dense medium in terms of:
           
          (i)
          The relative sizes of the angles of incidence and refraction.
          [1]
          (ii)
          The direction of the refracted light ray in relation to the normal.
          [1]
            Assess your score
              
            Key Concepts
            Refraction

            Question 2b

            Marks: 3

            The refractive index is calculated using the equation:

            nc over v

            (b)
            Write in the missing information to complete the following table:
             

            Quantity

            Symbol

            Units

             

            n

            No units

             

            c

             

            Speed of light in medium

             v

             

            [3]

              Assess your score
                
              Key Concepts
              Refraction

              Question 2c

              Marks: 1
              (c)
              Define the term critical angle.

              [1]

                Assess your score
                  
                Key Concepts
                Refraction

                Question 2d

                Marks: 2

                Incident light travelling through water approaches the surface of the water and meets the boundary with air. The incident ray has an angle of incidence = 40°.

                4-4-2d-question-stem-sl-sq-easy-phy

                The refractive index of air is 1.00 and the refractive index of water is 1.33.

                (d)
                Calculate the angle of refraction for the refracted ray.
                [2]
                  Assess your score
                    
                  Key Concepts
                  Refraction

                  Question 3a

                  Marks: 1
                  (a)
                  Define diffraction.
                  [1]
                    Assess your score
                      

                    Question 3b

                    Marks: 5

                    The diagram shows a student in a room with an open door and a television in the next room. 

                    4-4-3b-question-stem-sl-sq-easy-phy

                    The student can hear the sound of the television, but cannot see the picture coming from it. 

                    (b)
                    Complete the following sentences by circling the correct word to explain why this is the case. 
                     
                    Sound waves emitted from the television diffract / refract around the opening of the door because the amplitude / wavelength is similar in size to the door. The amplitude / wavelength of light is much larger / smaller than that of the sound waves, so light is not not diffracted / refracted around the opening of the door.
                    [5]
                      Assess your score
                        

                      Question 3c

                      Marks: 1
                      (c)
                      Define coherence.
                      [1]
                        Assess your score
                          

                        Question 3d

                        Marks: 4
                        The diagram shows two different waves from sources s1 and s2 meeting at point P
                        .
                         
                        4-4-3d-question-stem-sl-sq-easy-phy
                         
                        (d)
                        For the waves meeting at point P:
                         
                        (i)
                        Determine the path difference.
                        [3]
                        (ii)
                        State whether the interference will be constructive or destructive.
                        [1]
                          Assess your score
                            
                          Key Concepts
                          Path Difference

                          Question 4a

                          Marks: 1
                          (a)
                          Outline the conditions for destructive interference.
                          [1]
                            Assess your score
                              
                            Key Concepts
                            Path Difference

                            Question 4b

                            Marks: 1

                            Some light can be described as monochromatic.

                            (b)
                            State what is meant by the term monochromatic.
                            [1]
                              Assess your score
                                

                              Question 4c

                              Marks: 4

                              The diagram shows the wave fronts emitted from two point sources s1 and s2

                              4-4-4c-question-stem-sl-sq-easy-phy

                              (c)
                              The waves meet at point P.
                               
                              (i)
                              By considering the number of waves, determine the path difference.
                              [3]
                              (ii)
                              State whether constructive or destructive interference would occur at point P.
                              [1]
                                Assess your score
                                  
                                Key Concepts
                                Path Difference

                                Question 4d

                                Marks: 2

                                The diagram shows two sources of coherent light producing a double-slit interference pattern. 

                                4-4-4d-question-stem-sl-sq-easy-phy

                                (d)
                                State whether the interference is constructive or destructive at point:
                                 
                                (i)
                                A.
                                [1]
                                (ii)
                                B.
                                [1]
                                  Assess your score
                                    

                                  Question 5a

                                  Marks: 3

                                  The distance between the bright fringes in a double-slit interference pattern can be determined by the double-slit equation

                                  sfraction numerator lambda D over denominator d end fraction

                                  (a)
                                  Draw a line to match the quantity to the correct symbol.
                                  double-slit-eq
                                  [3]
                                    Assess your score
                                      
                                    Key Concepts
                                    Double-Slit Equation

                                    Question 5b

                                    Marks: 2

                                    Red laser light is used to form a double-slit interference pattern on a screen.

                                    4-4-5b-question-stem-sl-sq-easy-phy

                                    The distance between the bright fringes depends on the wavelength of the incident light.

                                    (b)
                                    Outline how the interference pattern would be affected if blue laser light were used instead.
                                    [2]
                                      Assess your score
                                        
                                      Key Concepts
                                      Double-Slit Equation

                                      Question 5c

                                      Marks: 4

                                      Red laser light of wavelength λ = 650 nm is used to form a double-slit interference pattern on the screen as shown. 

                                      4-4-5b-question-stem-sl-sq-easy-phy

                                      The separation distance of the slits d = 0.2 mm, and the distance between the slits and the screen D = 1.2 m.

                                      (c)
                                      Calculate the separation distance between the fringes on the screen s.
                                      [4]

                                        Assess your score
                                          
                                        Key Concepts
                                        Double-Slit Equation

                                        Question 5d

                                        Marks: 2

                                        For the interference pattern shown in part (c):

                                        4-4-5d-question-stem-sl-sq-easy-phy

                                        (d)
                                        Explain why there is no bright fringe at point X.
                                        [2]
                                          Assess your score
                                            
                                          Key Concepts
                                          Double-Slit Equation