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Author Question: An electromagnetic wave is propagating towards the west in free space. At a certain moment the ... (Read 56 times)

K@

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on: Jul 29, 2018
An electromagnetic wave is propagating towards the west in free space. At a certain moment the direction of the magnetic field vector associated with this wave points vertically upward. What is the direction of the electric field vector?
 
  A) horizontal and pointing south
  B) vertical and pointing down
  C) horizontal and pointing north
  D) vertical and pointing upward
  E) horizontal and pointing east

Question 2

The human eye can just detect green light of wavelength 500 nm if it arrives at the retina at the rate of 2  10-18 W. How many photons arrive each second? (c = 3.0  108 m/s, h = 6.626  10-34 J  s)
 
  What will be an ideal response?


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Christopher

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

A

Answer to Question 2

5


K@

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Reply 2 on: Jul 29, 2018
Excellent

Dnite

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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