X-ray Attenuation MCQ (Multiple Choice Questions) PDF Download

Gradual decrease in x-ray beam intensity as it passes through material is called

1. attenuation
2. decay
3. radioactivity
4. imaging

Attenuation coefficient of bone is 600 m^-1 for x-rays of energy 20 keV and intensity of beam of x-rays is 20 Wm^-2, then intensity of beam after passing through a bone of 4mm is

1. 3 Wm^-2
2. 2.5 Wm^-2
3. 2.0 Wm^-2
4. 1.8 Wm^-2

Bones look white in x-ray photograph because

1. they are bad absorbers of x-rays
2. they reflect x-rays
3. they are good absorbers of x-rays
4. they are bad absorbers of ultraviolet rays

Attenuation coefficient depends on

1. frequency of x-ray photons
2. wavelength of x-ray photons
3. energy of x-ray photons
4. amplitude of x-ray photons

As the x-rays pass through matter, it's intensity

1. increases
2. decreases
3. remains constant
4. may increase or decrease depending on the object