A Beam of Gamma Rays Strikes a Lead Target with a Half-Value

question 7

Multiple Choice

A beam of gamma rays strikes a lead target with a half-value layer of 0.40 cm. What fraction of the photons in the beam will penetrate to a depth of 1.20 cm or more?

• A) 0.500
• B) 0.400
• C) 0.333
• D) 0.250
• E) 0.125

---

Definitions:

Ligaments

Strong, fibrous tissues that connect bones to other bones, providing stability and support to joints.

Tendons

Tough, flexible bands of fibrous tissue that connect muscles to bones, transmitting the force necessary to move the bone.

Muscles

Tissues in the body that have the ability to contract, enabling movement.

Identifiable Cause

A specific, known reason or factor that leads to a condition or event.