Evaluating an Electric Field
Not what you're looking for?
Question: A small helium-neon laser emits red visible light with a power of 3.20mW in a beam that has a diameter of 2.50mm.
(a) What are the amplitude of the electric and magnetic fields of the light?
(b) What are the average energy densities associated with the electric field and with the magnetic field?
(c) What is the total energy contained in a 1.00m length of the beam?
Purchase this Solution
Solution Summary
This solution is provided in a step-wise manner and presented under proper formatting in an attached pdf. file.
Solution Preview
Please view the attached file for proper formatting.
Power of laser light (P) = 3.20 mW = 3.2*10^(-3) W
diameter (d) = 2.5 mm
=> radius (r) = 1.25 mm = 1.25*10^(-3)m
Area of cross section (=A) = pi*r^2 = pi*(1.25*10^(-3))^2 = 4.9*10^(-6) m^2
Hence intensity ...
Education
- BEng, Allahabad University, India
- MSc , Pune University, India
- PhD (IP), Pune University, India
Recent Feedback
- " In question 2, you incorrectly add in the $3.00 dividend that was just paid to determine the value of the stock price using the dividend discount model. In question 4 response, it should have also been recognized that dividend discount models are not useful if any of the parameters used in the model are inaccurate. "
- "feedback: fail to recognize the operating cash flow will not begin until the end of year 3."
- "Answer was correct"
- "Great thanks"
- "Perfect solution..thank you"
Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics
This quiz is designed to test and improve your knowledge on Classical Mechanics.
Basic Physics
This quiz will test your knowledge about basic Physics.
Variables in Science Experiments
How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.
Introduction to Nanotechnology/Nanomaterials
This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.
Intro to the Physics Waves
Some short-answer questions involving the basic vocabulary of string, sound, and water waves.