Each of the following statements regarding intensifying screens is correct EXCEPT one. Which one is the EXCEPTION?
a. They work in pairs.
b. They require less radiation to produce an image.
c. They transfer x-ray energy into visible light.
d. They are sensitive to white-light exposure.
d. Intesifying screens are not sensitive to visible light. The fluorescent crystals in intensifying screens called "phosphors" give off blue or green light when exposed by x-rays.
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Which of the following statements about radiation is MOST accurate?
A) All bodies emit radiation at a constant rate. B) When two bodies have different temperatures, there will be a transfer of energy from the body of higher temperature to the body of lower temperature. C) Vertical communication of fire is due mainly to radiation. D) The Stefan-Boltzmann law states that the intensity of thermal radiation is a function of the square of the absolute temperature of the thermal radiation source.
Once single tandem repeat (STR) loci have been amplified, what is used to separate alleles by size?
a. Electrophoresis b. Fluorescent emissions c. Lasers d. Reagents