Question: The lamp has a beryllium window. The mass absorption coefficient for beryllium at this wavelength is 1.12 cm/g; its density is 1.85 g/cm. What

The lamp has a beryllium window. The mass absorption coefficient for beryllium

The lamp has a beryllium window. The mass absorption coefficient for beryllium at this wavelength is 1.12 cm/g; its density is 1.85 g/cm. What maximum thickness of beryllium could be used to fabricate the windows if no more than 0.01% of the radiation is to be absorbed by it?

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