Solve. -The Intensity I of Light Varies Inversely as the Square

question 45

Multiple Choice

Solve.
-The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 ft from a light is 2 foot candles, find the intensity on a screen 20 ft from the light.
Express the answer as a fraction.

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Definitions:

ACTH

Adrenocorticotropic hormone, a pituitary gland hormone that stimulates the adrenal glands to release cortisol.

Glucocorticoids

A class of corticosteroids, which are a type of steroid hormone that plays a crucial role in regulating metabolism, inflammation, and immune responses.

Adrenal Cortex

The adrenal cortex is the outer portion of the adrenal glands, which produce vital hormones such as cortisol and aldosterone that regulate metabolism and blood pressure.

Testosterone

A primary male sex hormone that plays a key role in the development of male reproductive tissues and secondary sexual characteristics.