Thursday, 25 September 2014

Waves and oscillations


1.   In an earthquake waves there are two types of waves. What are they called?

2.   What type of material can they each pass through and why?


3.   (a) What is meant by diffraction of a wave?

(b)  Is the amount of diffraction more with large or small gap?

(c) Is the amount of diffraction more with large or small wavelength?

4.   How do your answers to (b) and (c) affect the reception of TV and radio in hilly area.


5.   (a) What is meant by Resonance

(b)  Give one every day example of resonance

6.   Describe with the help of a diagram what is meant by an Analogue signal

7.   Describe what is meant by a Digital signal

8. What are the advantages of digital recording over analogue

9. Draw a piece of magnetic tape showing a recorded section

10. Draw a diagram to show a train of light waves moving from air to glass

11. Apart from refracting happens to a light wave when it passes from air to glass

12. What is the instrument used to measure the strength of an earthquake called?

13. Is the natural frequency of large objects high or low?

14. Put the following examples of electromagnetic radiation in order starting with the one which has the highest frequency:
      Light       X rays         Radio      Ultra violet      Microwaves


15. Explain using a diagram why the same note played on a violin and then on a flute sounds different.

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