Question

If one shines a laser with wavelength λ = 650 nm through a single slit of width a = 0.04 mm, draw the diffraction pattern you might expect on a screen 10 m behind slit. How far apart are the minima ?

Answer 1

Answer:

y = 162.5 mm

Explanation:

given,

wavelength of the laser, λ = 650 nm

width of the slit, a = 0.04 mm

distance, D = 10 m                      

now, distance apart the minima is equal to

  $y =\dfrac{\lambda D}{d}$          

  $y =\dfrac{650 \times 10^{-9}\times 10}{4 \times 10^{-5}}$

         y = 0.1625 m            

         y = 162.5 mm

minima is 162.5 mm apart.