FACULTY OF SCIENCE, AUTUMN 2007
PHYS 124 LEC A1 : Particles and Waves
(Instructor: Marc de Montigny)
Walker, Physics, Chapter 25 : Electromagnetic Waves
- Section 25-1: Omitted
- P. 839, Figure 25-3 shows the
propagation of an electromagnetic wave in terms of the electric
and magnetic vectors.
- P. 840, read paragraph "Direction of Propagation for
Electromagnetic Waves"
- Section 25-2: Propagation of Electromagnetic Waves
- P. 841, Eq. 25-1 : c = 3×108 m/s. Exact value :
2.99 792 458×108 m/s. Speed of light in vacuum.
- P. 842, Eq. 25-2 shows the connection between light, electricity and
magnetism. ε0 is defined in P. 650, Eq. 19-12, and
μ0 is defined in P. 750, Eq. 22-8
- Section "The Doppler Effect" is omitted.
- Section 25-3: The Electromagnetic Spectrum
- P. 845, Eq. 25-4 : c = f λ
- P. 846, Figure 25-8
- Radio Waves: f ∼ 106 Hz to 109 Hz,
λ ∼ 300 m to 0.3 m
- Microwaves: f ∼ 109 Hz to 1012 Hz,
λ ∼ 300 mm to 0.3 mm
- Infrared Waves: f ∼ 1012 Hz to 4.3×1014 Hz,
λ ∼ 0.3 mm to 700 nm
- Visible Light: f ∼ 4.3×1014 Hz to
7.5×1014 Hz,
λ ∼ 700 nm to 400 nm
- Ultraviolet Light: f ∼ 7.5×1014 Hz to 1017 Hz,
λ ∼ 400 nm to 3 nm
- X-Rays: f ∼ 1017 Hz to 1020 Hz,
λ ∼ 3 nm to 0.003 nm
- Gamma Rays: f ∼ 1020 Hz and higher,
λ ∼ 0.003 nm and smaller
- Section 25-4: Omitted
- Section 25-5: Omitted
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