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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