If we observe the single slit Fraunhofer diffraction with wavelength λ and slit width d, the width of the central maxima is 2 θ. On decreasing the slit width for the same λ

Question

If we observe the single slit Fraunhofer diffraction with wavelength λ and slit width d, the width of the central maxima is 2 θ. On decreasing the slit width for the same λ (A) θ increases (B) θ remains unchanged (C) θ decreases (D) θ increases or decreases depending on the intensity of light

Tardigrade Admin · Accepted Answer

2 θ=(2 λ/d) (where d= slit width As d decreases, θ increases.

Q. If we observe the single slit Fraunhofer diffraction with wavelength $λ$ and slit width $d$ , the width of the central maxima is $2 θ$ . On decreasing the slit width for the same $λ$

$θ$ increases

$θ$ remains unchanged

$θ$ decreases

$θ$ increases or decreases depending on the intensity of light

$2 θ = \frac{2 λ}{d}$ (where $d =$ slit width
As $d$ decreases, $θ$ increases.

Q. If we observe the single slit Fraunhofer diffraction with wavelength λ and slit width d, the width of the central maxima is 2θ. On decreasing the slit width for the same λ

θ increases

θ remains unchanged

θ decreases

θ increases or decreases depending on the intensity of light