Wave length of X-rays is about 1 angstrom; however it cannot pass thro

1.	Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________?
A.	Paper
B.	Cloth
C.	Lead
D.	Aluminium
Answer» D. Aluminium

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Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of ________________?

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