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Author Question: If the electric field and magnetic field of an electromagnetic wave are given by E = E0 sin(kx - t) ... (Read 144 times)

gonzo233

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  • Posts: 557
on: Jul 29, 2018
If the electric field and magnetic field of an electromagnetic wave are given by E = E0 sin(kx - t) and B = B0 sin(kx - t), and if the value of E0 is 51 V/m, what is the value of B0? (c = 3.0 x 108 m/s)
 
  A) 1.7  1014 T
  B) 1.7  103 T
  C) 1.7  10-14 T
  D) 1.7  104 T
  E) 1.7  10-13 T

Question 2

The objective lens of an astronomical telescope has a focal length of 60 cm and the eyepiece has a focal length of 2 cm. How far apart should the lenses be placed in order to form a final image at infinity?
 
  A) 44 cm
  B) 58 cm
  C) 76 cm
  D) 60 cm
  E) 62 cm


cat123

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Reply #1 on: Jul 29, 2018
Answer to Question 1

E

Answer to Question 2

E


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