1. Do Now (3 mins): Normal Form Standard Form 9300000 a) 0.00008066 b) c)
7.78 x 105 d)
1.115 x 10-6 e)
4259 f) g)
6.25 x 1018 h)
1.6 x 10-19

2. Absence
Moodle (and HWK Answers)

3. SHOW ALL WORKING
Calculate the wavelength of a wave with 200 MHz frequency travelling at 0.02 ms-1.
Calculate the frequency of a wave 12 nm long travelling 90.0 cm in one minute.
Calculate the wave speed of a wave which takes two minutes to travel 440 um.

4. Prefix multipliers Power Prefix Symbol 109 giga G 106 mega M 103 kilo
10-3
milli m
10-6
micro μ
10-9
nano n
10-12
pico P
* 10-2
centi c

6. Question
“One of the most important scientific advances of the last 200 years is the discovery and application of ________________”

8. Electromagnetic Waves
Electromagnetic waves are made up of oscillating electric and magnetic fields.
All electromagnetic waves travel at the speed of light, c, in a vacuum.
c = speed of light = 3.0 x 108 ms-1
Electromagnetic waves do not require medium to travel.

9. Radio Wave
f = 3 kHz ~ 300 MHz
λ = 100 km ~ 1 m

11. Micro Wave
f = 300 MHz ~ 300 GHz
λ = 1 m ~ 1 mm

13. Infrared
f = 300 GHz ~ 400 THz
λ = 1 mm ~ 750 nm

16. Visible Light
f = 400 THz ~ 770 THz
λ = 750 nm ~ 390 nm

18. Ultra violet (UV)
f = 770 THz ~ 30 PHz
λ = 390 nm ~ 10 nm

21. X-ray
f = 30 PHz ~ 30 EHz
λ = 10 nm ~ 0.01 nm

24. Gamma ray
f = higher than 30 EHz
λ = shorter than 0.01 nm

25. Electromagnetic Waves
Electromagnetic waves are made up of oscillating electric and magnetic fields.
All electromagnetic waves travel at the speed of light, c, in a vacuum.
c = speed of light = 3.0 x 108 ms-1
Electromagnetic waves do not require medium (particles to transfer energy).