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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 7, Problem 41E
Textbook Problem
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Cellular phones operate at frequencies of approximately 850 megahertz. What is the wavelength of the radio waves used by cell phones?

Interpretation Introduction

Interpretation:

The wavelength of radio waves used by cell phones is to be calculated.

Concept Introduction:

The electromagnetic spectrum is the range of all types of radiation.

Electromagnetic waves are described by three properties, namely, frequency (ν), wavelength (λ) and energy of the photon (E) which are related to each other by the following formula:

E=(h×cλ)=h×ν

Here “h” is Plank’s constant, “λ” is the wavelength, “ν” is the frequency and “c” is the speed of light.

Radio waves are a form of electromagnetic radiation with long wavelengths. The energy of radio waves is quite small. The radio captures radio waves emitted by the radio stations.

Explanation of Solution

Given information: The frequency of radio waves is 850 megahertz.

The energy of the photons is given by the following expression:

E=hcλ=hν

Here,

h=6.626×1034J s (planks constant), c=3×108m/s (speed of light) and λ is wavelength of radiation

Also,

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Chemistry In Focus
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