The filament of a 60W lightbulb is at 2.8kK.
What's the surface area of the filament?
find the energy/area at2800K.
http://en.wikipedia.org/wiki/Stefan%E2%80%93Boltzmann_law
but energy=60w
solve for area
To calculate the surface area of the filament, we need to know the dimensions of the filament. However, the temperature alone is not enough information to determine the dimensions.
Typically, the dimensions of a lightbulb filament are not provided directly, but we can make an approximation based on some assumptions.
Let's assume that the filament has a cylindrical shape. In this case, we can use the formula for the surface area of a cylinder. The formula is:
Surface Area = 2 * π * r * h + 2 * π * r²
Where:
- π is a mathematical constant approximately equal to 3.14159,
- r is the radius of the filament, and
- h is the height of the filament.
Without knowing the specific dimensions of the filament, we cannot calculate the surface area accurately. If more information is available, such as the radius or height of the filament, we can use those values to calculate the surface area using the formula provided.