Chapter Assumptions
Unless stated otherwise, electromagnetic waves are assumed to be propagating as plane waves through a vacuum.
When converting light-years to meters, assume that a year has 365 days.
The speed of light in a vacuum is 3.00×10^8 m/s.
The Sun radiates energy at the rate of 3.91×10^26 W.
Answers to selected problems
Chapter 30 Answers
C.1 AM
Answers vary
C.4 (a) Northísouth
(b) Vertical
C.6 (a) Vertical
(b) Vertical
1.1 (a) 1.28 lightíseconds
(b) 8.34 lightíminutes
(c) 2.6e20 m
1.3 (a) 7.5e5 Hz
(b) AM
1.5 (a) 12.2 cm
(b) 6.10 cm
(c) Yes
1.7 (a) (0, 0, 0)
(b) (255, 255, 255)
(c) 16777216 colors
1.9 (a) 19%
(b) 57%
(c) 16%
2.1 Away from you
3.1 1.39eí6 T
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