The illumination from a light source is inversely proportional to the square of the distance from the light source. Ansel is taking a portrait with his light source set 4 feet from his subject and finds that the illumination is twice as bright as it should be. If he wants to reduce the illumination to one-half of what it is now, at what distance should he place the light? Include a sketch of the situation in your answer, along with some sentences explaining your approach to the problem.
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Adjusting a photographer's lighting. The illumination from a light source is inversely proportional to the square of the distance from the light source. Ansel is taking a portrait with his light source set 4 feet from his subject and finds that the illumination is twice as bright as it should be. If he wants to reduce the illumination to one-half of what it is now, at what distance should he place the light?
Include a sketch of the situation in your answer, along with some sentences explaining your approach to the problem.
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