A diffraction grating 2.0 cm wide has 6000 rulings.At what angles will

1.	A diffraction grating 2.0 cm wide has 6000 rulings.At what angles will max. Intensity occur?
Answer» `0^(@), PM3^(@), pm9^(@), pm16^(@)`.... `0^(@), pm10^(@), pm32^(@), pm45^(@)`.... `0^(@),6^(@), 9^(@), 19^(@)`.... `0^(@), 4^(@), 8^(@), 12^(@)`.... Solution :`(a + b) sin THETA = N lambda , a+ b = (2.0)/(6000)cm` `lambda = 5890 xx 10^(-8)` cm Then `sin theta = (n lambda)/(a + b) = 0.1767 n` Here `n= pm (0, 1, 2...)` `therefore theta = sin^(-1) (0.1767), sin^(-1)(2 xx 0.1767)`... `therefore theta = 0^(@), pm 10^(@), pm 32^(@), pm 45^(@)`...

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A diffraction grating 2.0 cm wide has 6000 rulings.At what angles will max. Intensity occur?

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