A. What do the following words or phrases mean? Write a description of at least one sentence for each.
1) telecommunication
2) sound
3) wave
4) speed
5) instantaneously
6) morse code
7) amplitude
8) frequency
9) period
10) wavelength
11) radio transmitter
12) tuner (radio)
13) decoder (radio)
14) amplifier
15) carrier wave
16) modulation
17) diffraction
18) deflection plates (or coils) (oscilloscope/TV)
19) persistence of vision
20) primary colour
21) law of reflection
22) principle of reversibility
23) angle of incidence
24) refraction
25) critical angle
26) total internal reflection
27) optical fibre
28) parallel beam
29) geostationary
30) curved reflector
31) microwaves
32) light-year