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Unformatted text preview: and energy.
main parameters of the wave nature 2. It is electromagnetic radiation,
composed of fluctuating electric and
magnetic fields that are perpendicular
to the motion of the wave and to each
3. It can also be described as a particle,
with characteristics of mass and
7 Light as a type of electromagnetic radiation
All types of electromagnetic radiation move through a vacuum at the
speed of light (c), a constant. The speed of light is equal to the
product of the wavelength (λ) and frequency (v).
c c=λv = Wavelength, in units of metres (m)
= ___________________, in units of s-1 (or hertz, Hz)
= velocity of light (3.00 x 108 m s-1 in a vacuum) From this relationship we can see that the frequency is inversely
related to the wavelength. 8 4 05-Sep-13 Consider two beams of the same yellow light. Imagine that one
beam has its wavelength doubled; the other has its frequency
doubled. Which of these two beams is then in the ultraviolet region? frequency- large no.s,
wavelength- very small in nm
answer- frequency: if u double it, u move in the UV regime 9 Example: A dental hygienist uses x-rays* to take a series of
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