In a franhofer diffraction experiment at a single slit using a light of wavelength 400 nm, the first minimum is formed at an angle of 30. The direction of the first secondary maximum is given by

Options

(a) sin⁻¹ ( 1 / 4 )
(b) tan⁻¹ ( 2 / 3 )
(c) sin⁻¹ ( 2 / 3 )
(d) sin⁻¹ ( 3 / 4 )

Correct Answer:

sin⁻¹ ( 3 / 4 )

Explanation:

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