Sunday
March 29, 2015

Homework Help: Physics

Posted by J on Monday, March 31, 2008 at 7:10pm.

We can reasonaly model a 75 W incandescent lightbulb as a sphere 6 cm in diameter. Typically, only about 5% of the energy goes to visible light; the rest goes largely to nonvisible infrared radiation. (a) What is the visible light intensity (in W/m^2) at the surface of the bulb? (b) What are the amplitudes of the electric and magnetic fields at this surface, for a sinusoidal wave with this intensity?

ok..once again I am totally confused.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics - We can reasonably model a 75 W incandescent light bulb as a sphere 6....
Physics - A 75 W light source consumes 75 W of electric power. Typically only ...
physics - A 75 W light source consumes 75 W of electric power. Typically only ...
college chemistry - Assuming that 9.0\% of the energy output of a 65W lightbulb ...
physics - If a 80 lightbulb emits 4.0 of the input energy as visible light (...
Quantum Physics - How is it a substance can emit photons of visible light after ...
science - In the process called fluorescence, some substances absorb photons of ...
Chemistry Lab - Infrared, ultraviolet, and visible radiation are all part of the...
physics - Describe the energy conversions that occur in each of the following ...
Chemistry - Describe the spectrum of the light from a fluorescent lamp and from ...

Members