Investigating the Inverse Law of Light and Fluorescent Tubes

In summary, the inverse law of light states that as the distance between a light source and an object increases, the intensity of light decreases in proportion to the square of the distance. This law applies to fluorescent tubes, which operate by converting electrical energy into light through the excitation of gas molecules inside the tube. To investigate this law with fluorescent tubes, one can measure the distance between the tube and a light sensor and record the corresponding light intensity. Some variables that can affect the accuracy of the experiment include ambient light, tube quality, and light sensor sensitivity. The results of this investigation can be applied in real-world situations such as photography, lighting design, and energy conservation efforts.
  • #1
kingkong
11
0
hello,
iam doing an investigation on the inverse law using light. i want to know why can a flourescent tube act a line source? why is it that when you get too far the is acts a point source?

i look forward to your response
 
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  • #2
inverse what law? inverse square?
your answer seems to be in calculus of the problem. try putting infinity for distance, and compare the result with point source's equation.
 

FAQ: Investigating the Inverse Law of Light and Fluorescent Tubes

What is the inverse law of light?

The inverse law of light states that as the distance between a light source and an object increases, the intensity of light decreases in proportion to the square of the distance.

How does this law apply to fluorescent tubes?

Fluorescent tubes operate by converting electrical energy into light through the excitation of gas molecules inside the tube. As the distance between the tube and the object increases, the intensity of light decreases according to the inverse law.

How do you investigate the inverse law of light with fluorescent tubes?

To investigate the inverse law of light with fluorescent tubes, you can measure the distance between the tube and a light sensor, and record the corresponding light intensity. Then, you can repeat this process at different distances and plot the results on a graph to observe the inverse relationship between distance and light intensity.

What variables can affect the accuracy of the experiment?

Some variables that can affect the accuracy of the experiment include the ambient light in the room, the quality and condition of the fluorescent tube, and the sensitivity of the light sensor. It is important to control these variables to ensure accurate results.

How can the results of this investigation be applied in real-world situations?

The inverse law of light has many practical applications, such as in photography where it is used to determine the appropriate exposure for a photo. It is also important in lighting design to ensure proper illumination in a space. Understanding this law can also help in energy conservation efforts by optimizing the placement of light sources to reduce energy consumption.

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