Is it a power function, or an exponential one? I know the right eqn is Y=A/X^2, but my data is showing exponential!
2006-12-18 05:29:22 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Physics
The data obtained should show an inverse square relationship ideally but there may be factors such as internal reflections, adsorption by air and light from external sources which interfere and give your data the appearance of an exponential one.
Also if you are using a device which use LDR, there is a problem in that there is always a small current which continues to pass and this corrupts the relationship towards an exponential decay one.
2006-12-18 05:36:35 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The light is considered to be a point source spreading equally in all directions the area is a function of the radius squared.
Plot your data using Intensity vs 1/the radius squared find the best fit straight line.
2006-12-18 05:34:48 · answer #2 · answered by Roadkill 6 · 0⤊ 1⤋
The equation is correct
2006-12-18 05:32:39 · answer #3 · answered by Gene 7 · 0⤊ 0⤋