A shortened wavelength can be described as being: low frequency ...

[MirandaLo]

A shortened wavelength can be described as being:
 
 low frequency
  only a quarter cycle
  only half a cycle
  high frequency

Question 2

Imaging the patient's chest with posterior oblique positions will best image:
 
 both lungs
  the lung furthest from the image receptor
  the lung closest to the image receptor
  the diaphragm

[amit]

Answer to Question 1

high frequency

Rationale: Shortened wavelengths will be higher frequency, whereas longer wavelengths have lower frequency. The electromagnetic spectrum is arranged by energies from shortest wavelength to longest wavelength.

Answer to Question 2

the lung closest to the image receptor

Rationale: The 45-60 degree posterior oblique position will best image the lung positioned closest to the image receptor.