Please observe the Forum Rule regarding bumping.OhNoYaDidn't said:
What does the Poynting vector tell you about the wave's intensity? What are it's units?OhNoYaDidn't said:Homework Statement
[/B]
Homework Equations
The Attempt at a Solution
I found the expression for the magnetic field, and then the Poynting vector.
If i find the intensity, that's the same as finding the average value of the Poynting vector, and the cos^2 disappears... Can you tell me what to do next?
Thank you.
Power irradiance is the amount of power per unit area that is received from an electromagnetic wave. It is important because it helps us understand the intensity of the radiation and its effects on different materials and systems.
Power irradiance is usually measured in watts per square meter (W/m²) or milliwatts per square centimeter (mW/cm²). This can be done using specialized equipment such as a radiometer or photometer.
Power irradiance can be affected by a variety of factors, including the distance from the source, the angle of incidence, and the properties of the medium through which the radiation passes. Other factors such as atmospheric conditions and the wavelength of the radiation can also play a role.
Intensity is a measure of the strength or concentration of any type of energy, including electromagnetic radiation. Power irradiance is directly related to intensity, as it represents the amount of power per unit area of a given radiation. The higher the power irradiance, the greater the intensity of the radiation.
Power irradiance has many practical applications, including in the fields of optics, solar energy, and medical imaging. It is also used in industries such as agriculture, where it can help determine optimal conditions for plant growth, and in manufacturing, where it can be used to control the intensity of laser beams for cutting and welding.