Which of the following expressions correctly determines radiographic density?

Related MCQs

• A radiographic exposure with 3700 GBq (100 Ci) source of Ir-192 using source to film distance of 60 cm results in a radiation intensity of 0.12 Gy/h (11.8 R/h) and a radiographic density of 2.5. The intensity of radiation needed to obtain the same density when the source to film distance is changed to120 cm is:
• A radiograph is made using film X with an exposure of 10 mA-min. Film density obtained in the area of interest is 1.0. If it is desired to achieve a density of 2.0 in the area of interest, what exposure is required? (Log relative exposure = 1.1 for a density of 1.0 and 1.62 for a density of 2.0)
• A radiograph is made using film X with an exposure of 10 mA-min. Film density in the area of interest is 1.0. If it is desired to achieve a density of 2.0 in the area of interest, what exposure is required? (Log relative exposure = 1.1 for a density of 1.0 and 1.62 for a density of 2.0)
• An exposed radiographic film which transmits 1% of the light incident on it has what density:
• A low density image of the letter ‘B’ on a radiographic film would probably be caused by:
• The density of the radiograph through the weld area is 3.2 while the density in the base metal is 2.9. This would probably indicate:
• Which of the following statements should be true to achieve the highest level of radiographic sharpness (definition)?
• Which of the following viewing conditions is most desirable for interpreting radiographic film?
• Which of the following isotopes are commonly used for radiographic purposes?
• Which of the following types of radiation is commonly used in radiographic testing? (Choose one):