The energy flow to the earth from sunlight is about
zgribestika
Answered question
2021-12-15
(a) Find the maximum values of the electric and magnetic fields for a sinusoidal wave of this intensity.
(b) The distance from the earth to the sun is about
Answer & Explanation
Vivian Soares
Beginner2021-12-16Added 36 answers
(a) The indicated value indicates the intensity of the light. An electromagnetic wave's intensity in a vacuum is inversely proportional to the amplitude of the electric field. and the amplitude of magnetic field and is given by the equation:
, where is a electric constant, is speed of light.
Now, solve the equation for
Plug the values for into equation
Maximum magnetic field and maximum electric field have a relationship in the following way:
Now, plug the values into the equation
(b) The intensity is propotional to and represents the incident power per area
The radius of the Earth's path around the Sun is represented by the distance between it and the Sun, and this distance is thought to be a sphere. The area is computed as follows:
Now, plug in the values:
The answer is: (a) , (b)
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