Waves- Triple

Question 1

Digital signals

Answer 1

Are converted into binary and then a series of electrical impulses

Question 2

Advantages of digital signals

Answer 2

1. Signals need to be regenerated and these at accurate copies of the original signals
2. System is easier to design than analogue systems
3. Takes a wider range of frequencies to broadcast a series of analogue signals

Question 3

Analogue signals

Answer 3

Are converted into electrical voltages/currents

Question 4

Diffraction

Answer 4

When waves bend around edges and gaps causing the waves to spread out

Question 5

The amount of diffraction depends on

Answer 5

The size of the gap relative to the wavelength

Question 6

The narrower the gap

Answer 6

The longer the wavelength and the more the waves spread out

Question 7

Oscilloscope

Answer 7

Converts sound waves to electrical signals

Question 8

Amplitude

Answer 8

1. Greater the amplitude the more energy it carries
2. Means the sound will be louder
3. Louder sounds will have a trace with a larger amplitude

Question 9

Frequency

Answer 9

The more complete cycles displayed on the screen, the higher the frequency meaning the sound will be high pitched