Answer
$E=2.65$
Work Step by Step
We know that:
$E=\sqrt{E_1^2+E_2^2+2E_1E_2cos(\theta)}$
We plug in the known values to obtain:
$E=\sqrt{(1)^2+(2)^2+2(1)(2)cos(60)}$
$E=2.65$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 35 - Interference - Problems - Page 1076: 29
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