Physics
posted by Alex .
A 100 watt bulb emits light in all directions. The distance R from the bulb is equal to 1.0 meter.
Complete the table below with calculated values of intensity of the bulb.
Distance from Source Intensity (W/m2)
R ?
2R ?
3R ?
c) If the bulb was replaced by a 75 watt bulb, at position 2R the intensity would be?

this is really nonsense. 100 watt light bulbs do not radiate 100 watts of luminous energy. So using the inverse square law is silly, at best.
Respond to this Question
Similar Questions

physics
A light bulb is wired in series with a 133Ω resistor, and they are connected across a 120V source. The power delivered to the light bulb is 22.5 W. What are the two possible resistances of the light bulb? 
Physics
A 100.0 W light bulb hangs from the ceiling. What is the visible light intensity on the floor, 2.1 m directly below the bulb, if 10% of its output is visible light? 
physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 1/2 A of current through the light bulb and 5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 2.5 W. … 
college physics
You are in the lab with a 10 V battery. You have a 10 W light bulb and you want to put 0.75 A of current through the light bulb and 7.5 V across the light bulb. This will allow the light bulb to have a brightness proportional to 5.625 … 
Math
By what percent is a 100watt light bulb brighter than a 60watt light bulb? 
Physics/Algebra
Physics: For a 225watt bulb, the intensity I of light in lumens at a distance of x feet is I=225/x^2. a. What is the intensity of light 5 ft from the bulb? 
algebra
The intensity I of light bulb measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb . . suppose I is 45 w/m^2 when the distance is 5 m . find the intensity when the distance … 
math
The intensity of I of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose I is 85 w/m^2 when the distance is 5m. Find the intensity when … 
Math
the intensity l of light from a light bulb, measured in watts per square meter (w/m^2), varies inversely as the square of the distance d from the light bulb. Suppose l is 70 w/m^2 when the distance is 5m. Find the intensity when the … 
College Algebra
Intensity of Light. The intensity I of light from a light bulb varies inversely as the square of the distance d from the bulb. Suppose that I is 90 W / m 2 90W/m2 (watts per square meter) when the distance is 5 m. How much farther …