Radiology Practice Test

X-rays that are exposed in the mouth are high energy because they have short wavelengths. X-rays with shorter wavelengths have higher energy levels compared to those with longer wavelengths. Option B, low energy with long wavelengths, is incorrect because X-rays used in dental imaging have a high amount of energy to produce clear images. Option C, no specific energy, and Option D, medium energy, do not accurately describe the energy levels of X-rays used in mouth X-rays. Therefore, A, high energy with short wavelengths, is the correct answer.