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OpenStudy (anonymous):
helium-neon laser light (wavelength=638.2) is sent through 0.3 nm wide single slit.what is the width of the central maximum on a screen 1 m from the slit?
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OpenStudy (anonymous):
please help me
OpenStudy (anonymous):
\[\beta =\lambda D \div d\] beta=212.7 X 10^10
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