This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: An electromagnetic wave is propagating towards the west in free space. At a certain moment the ... (Read 67 times)

K@

  • Hero Member
  • *****
  • Posts: 608
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?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Christopher

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

5


K@

  • Member
  • Posts: 608
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

fatboyy09

  • Member
  • Posts: 358
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Queen - I Want To Break Free Queen - I Want To Break Free
Free Blacks in 1850 Free Blacks in 1850
The “first wave” of the U.S. women’s movement met enormous opposition. The women in this 1920 ... The “first wave” of the U.S. women’s movement met enormous opposition. The women in this 1920 ...
The fuel system should hold pressure if the system is leak free. The fuel system should hold pressure if the system is leak free.
Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ... Apply effleurage with wave motion to posterior cervical region. Use fingertips to slide along ...
Free energy diagrams for the simple reaction A ----> B Free energy diagrams for the simple reaction A ----> B
Video: HDL (high density lipoprotein)

For a complete list of videos, visit our video library