In the following, assume that lightbulbsradiate uniformly in all directions and that 5.0% of their power isconverted to light. (a) Find the average intensity of light at a point2.0 m from a 120-W red lightbulb 1l = 710 nm2. (b) Is the average intensity 2.0 m from a 120-W blue lightbulb 1l = 480 nm2greater than, less than, or the same as the intensity found in part(a)? Explain. (c) Calculate the average intensity for part (b).
In the following, assume that lightbulbsradiate uniformly in all directions and that 5.0% of their power isconverted to light. (a) Find the average intensity of light at a point2.0 m from a 120-W red lightbulb 1l = 710 nm2. (b) Is the average intensity 2.0 m from a 120-W blue lightbulb 1l = 480 nm2greater than, less than, or the same as the intensity found in part(a)? Explain. (c) Calculate the average intensity for part (b).
Chapter16: Electromagnetic Waves
Section: Chapter Questions
Problem 98AP: A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of...
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In the following, assume that lightbulbs
radiate uniformly in all directions and that 5.0% of their power is
converted to light. (a) Find the average intensity of light at a point
2.0 m from a 120-W red lightbulb 1l = 710 nm2. (b) Is the average intensity 2.0 m from a 120-W blue lightbulb 1l = 480 nm2
greater than, less than, or the same as the intensity found in part
(a)? Explain. (c) Calculate the average intensity for part (b).
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