Question

If a region of a radiograph only transmits 0.6% of the incident light as measured by...

If a region of a radiograph only transmits 0.6% of the incident light as measured by a densitometer, what is the optical density? Round your answer to one decimal place.

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Answer #1

Given data :

Region of Radiograph only transmits of incident light = 0.6 %

Note : optical density : It is the measure as the absorbed radiation of wavelength which is transmitted by incident light.

  • Optical density is the logarithmic of transmitted percentage of incident light(%T) by the region of radio graphy which is measured by densitometer.

Formulae :

Optical density = - (Io / It) or - (%T/100)

where Io is intensity of light incident

It is intensity of light transmitted by the region of radiography

Optical density = - (%T/100)

= - (0.6/100)

= - (-2.2)

Optical density = 2.2

.

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