A Grey Body Is One Whose Absorptivity

question 5

Multiple Choice

A grey body is one whose absorptivity

• A)varies with temperature
• B)varies with the wave length of incident ray
• C)varies with both
• D)does not vary with temperature and wave length of the incident ray
• E)there is no such criterion.

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Definitions:

Radiopaque Substance

A substance that does not allow X-rays or similar radiation to pass through, appearing white or light on radiographic images, used in contrast-enhanced imaging.

Fluorescence

The emission of light by a substance that has absorbed light or other electromagnetic radiation, occurring in various natural and artificial processes.

Venography

An imaging technique used to visualize veins filled with an injectable contrast medium, often used to diagnose blood clots.

Thermography

A process of recording the heat patterns and temperatures of objects, often used in medical diagnosis and building inspections.