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 passingthrough a bone of 4mm is {{}}

Attenuation coefficient of bone is 600 m-1 for x-rays of energy 20 keV

1.	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 passingthrough a bone of 4mm is {{}}
A.	3 Wm-2
B.	2.5 Wm-2
C.	2.0 Wm-2
D.	1.8 Wm-2
Answer» E.