Gamma rays are sometimes used to detect flaws in metal structures such as bridges. Why are gamma rays more useful for this application than x-rays?
A
Gamma rays have a shorter wavelengths so they able to penetrate metal objects.
B
Gamma rays have a lower frequencies so they able to penetrate metal objects.
C
Metal objects absorb gamma radiation but they are not affected by x-rays.
D
Metal objects reflect gamma radiation but they allow x-rays to pass through.