32. Electromagnetic Waves
Intensity of EM Waves
32. Electromagnetic Waves
Intensity of EM Waves
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- Multiple Choice
A 100 W lightbulb actually emits around only 10 W of light. What is the intensity of the light 1 cm away if the light is emitted perfectly spherically? What is the magnitude of the electric field emitted by the lightbulb? What about the magnetic field?
- Multiple ChoiceSuppose a certain star has a temperature of At what wavelength will this star emit the most energy?
- Multiple ChoiceA light bulb emits light uniformly in all directions. What is the electric field amplitude away from the light bulb?
- Multiple ChoiceWhat is the average magnitude of the Poynting vector for an electromagnetic wave with magnetic field amplitude equal to ?