According to inverse square law, what happens to exposure when distance increases?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for the General Core of Radiography – Limited Scope Test with interactive flashcards and multiple-choice queries. Each question features hints and clarifications, setting you up for success on your exam journey!

Multiple Choice

According to inverse square law, what happens to exposure when distance increases?

Explanation:
Exposure from a radiographic source follows the inverse square law: intensity is inversely proportional to the square of the distance. As distance increases, the same amount of energy spreads over a larger area, so exposure drops off quickly. Double the distance and exposure is one quarter; triple the distance and exposure is one ninth. Therefore, exposure decreases with the square of the distance. The other statements—exposure staying the same, increasing with distance, or increasing with distance squared—do not reflect how the energy spreads as distance grows.

Exposure from a radiographic source follows the inverse square law: intensity is inversely proportional to the square of the distance. As distance increases, the same amount of energy spreads over a larger area, so exposure drops off quickly. Double the distance and exposure is one quarter; triple the distance and exposure is one ninth. Therefore, exposure decreases with the square of the distance. The other statements—exposure staying the same, increasing with distance, or increasing with distance squared—do not reflect how the energy spreads as distance grows.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy