What are the features of waves? How do we categorise wave types? How
do waves move?
In this activity you will use the internet to understand the features
and characteristics of waves. You will learn the terminology we use to
describe the features of waves and how waves move.
Use the Internet
1. Work individually for this task
2. Visit the following website to find your information:
The Physics Classroom
Now answer the following questions:
1. Describe the difference between a longitudinal and transverse type
wave. Give one example of each type of wave.
2. Light is an electromagnetic wave that is considered to be transverse
in nature. What feature of this wave type suggests it is a transverse
3. Describe each of the following waves as propagating in one, two
or three dimensions:
(a) the light emitted from the Sun
(b) sound from a bell
(c) a sound wave travelling along a string telephone made from a tight
string and two tin cans
(d) a water wave produced by dropping a rock into the centre of a lake
4. Explain what is the frequency
of a wave. Is frequency the same as the period of a wave? If not, then
describe how they are related.
5. Describe what is the
speed of a wave. Explain how the speed of a wave is related to the frequency
and wavelength of a wave.
Problem solving Questions:
1. Look at the
picture shown below of a transverse wave:
wave is travelling at a speed of 14 metres per second. For this transverse
wave calculate the following values:
(a) The wavelength
(b) The amplitude
(c) The frequency
(d) The period
2. If eight water waves pass an ocean buoy each minute,
and successive wave crests are 20 m apart, find the wave velocity.
3. A Sydney radio station (MIX) broadcasts on 106.5 MHz.
Calculate the length of the transmitter antenna in order for it to be
exactly one half the wavelength of this transmission signal.
4. If the blue light reaching earth is from a blue star
with a wavelength of 410 nm, calculate the frequency of the light.
5. Fifty compressions of air pass a point every second.
If the speed of sound is 340 m/s, find the frequency and wavelength
of this wave.
6. The wavelength of certain red light in air is 624 nm.
(a) Calculate its frequency
(b) If this light enters water its speed is cut down
by 25% but its frequency is unaltered. Calculate the value of its wavelength
Congratulations you have now completed this activity worksheet.
Check all your answers carefully, enter your name and your teacher's
name in the text boxes below and finally print out this webpage to hand in to your teacher.
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