moxiegirl100 moxiegirl100
  • 14-05-2020
  • Chemistry
contestada

A typical cell phone uses wavelength of 0.36meters. How much energy does this wave have?

Respuesta :

pstnonsonjoku
pstnonsonjoku pstnonsonjoku
  • 20-05-2020

Answer:

55×10^-26 J

Explanation:

We can calculate the energy of the wave from

E= hc/λ

Where

h= Planks constant = 6.6×10^-34 Is

c= speed of light = 3×10^8 ms-1

λ= wavelength of the wave = 0.36 metres

Recall that cell phone use radio waves which belong to the electromagnetic spectrum hence it must possess the speed of light.

E= 6.6×10^-34 × 3×10^8/ 0.36

E= 55×10^-26 J

Hence the energy possessed by 0.36 meters wavelength radio waves is 55×10^-26 J

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