College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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can you please help

Transcribed Image Text:Example Problems
#7 A gamma ray has a frequency of 2.4 x 1020 Hz.
What is the energy of an individual photon?
Ephoton = hf
h = 6.63×10-³4 J·s

Transcribed Image Text:Example Problem: EM Waves Carry Energy
A cell phone emits a 1.9 GHz EM wave with total power 0.60 W.
(Assume the wave spreads out uniformly in all directions.)
#6a
At a cell phone tower 2.0 km away, what is the intensity of the wave? 1.194 × 10-8 W/m²
#6b
What are the electric and magnetic field strengths at this distance?
I
P _ ¹_c€0E3²
1
CEE
||
=
1 c
-B₂²
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