A first order reflection from the (111) planes of a cubic crystal was observed at a glancing angle of $11.5\degree$ when X-rays of wavelength 151 pm were used. The length of the side of the crystal is (Given sin 11.5°=0,199)

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A first order reflection from the (111) planes of a cubic crystal was observed at a glancing angle of $11.5\degree$  when X-rays of wavelength 151 pm were used. The length of the side of the crystal is (Given sin 11.5°=0,199)

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A first order reflection from the (111) planes of a cubic crystal was observed at a glancing angle of \(11.5\degree\) when X-rays of wavelength 151 pm were used. The length of the side of the crystal is (Given sin 11.5°=0,199)

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