Everything Science Grade 10

11.3 CHAPTER 11. ELECTROMAGNETIC RADIATION

travelling, one can assume that it is travelling through a vacuum. We

can identify two properties of the radiation -wavelength(200nm)and

speed (c).

Step 2:Apply the wave equation

c = fλ

3 × 108 m·s−^1 = f× 200 × 10 −^9 m

f = 1. 5 × 1015 Hz

Step 3:Quote the final answer

The frequency is 1. 5 × 1015 Hz.

Electromagnetic

spectrum

ESADK

EM radiation is classified into types according to the frequency of the wave: these types

include, in order of increasing frequency, radio waves, microwaves, infrared radiation,

visible light, ultraviolet radiation, X-rays and gamma rays.

See video: VPemp at http://www.everythingscience.co.za

Table 11.3 lists the wavelength and frequency ranges of the divisions of the electromagnetic

spectrum.

190 Physics: Waves, Sound and Light