SUMMARY
The average intensity of a 60 W bulb at a distance of 0.40 m can be calculated using the formula I = P/A, where P is the power and A is the area. Since the bulb radiates light uniformly, the area A is the surface area of a sphere with a radius of 0.40 m, calculated as A = 4πr². Substituting the values, the average intensity is determined to be approximately 118.4 W/m².
PREREQUISITES
- Understanding of the formula for intensity (I = P/A)
- Knowledge of surface area calculations for a sphere
- Familiarity with the concept of power in watts
- Basic principles of light propagation
NEXT STEPS
- Research the calculation of intensity for different power sources
- Learn about the effects of distance on light intensity
- Explore the concept of luminous flux and its relation to intensity
- Study the principles of spherical radiation and its applications
USEFUL FOR
Students in physics, educators teaching light and optics, and anyone interested in understanding the principles of light intensity and radiation.