Chapter 29, Problem 31PE

### College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Chapter
Section

### College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

# How many photons per second are emitted by the antenna of a microwave oven, if its power output is 1.00 kW at a frequency of 2560 MHz?

To determine

The photons per second are emitted by the antenna of a microwave oven, if its power output is 1.00 kW at a frequency of 2560 MHz

Explanation

Given info:

â€ƒâ€ƒp=1.00Ã—103Â W

â€ƒâ€ƒh=6.63Ã—10âˆ’34Â Jâ‹…s

â€ƒâ€ƒf=2560Ã—106Â Hz

Calculation:

Substituting the given values of joule in term of electron volt, we get

â€ƒâ€ƒ1â€‰J=11.6Ã—10âˆ’19Â eV

Energy of one photon in term of frequency and Planck's constant, we get

â€ƒâ€ƒE=hfÂ Â

Substituting the values of frequency and Planck's constant, we get

â€ƒâ€ƒEâ‰ˆ(6.63Ã—10âˆ’34Â J.s)(2560Ã—106Â Hz)Eâ‰ˆ(1

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