Answer:
L = 0.9562 m
Step-by-step explanation:
Given data:
wavelength of laser is 693 nm
distance of fringe Y = 0.107 MM
No of drak fringe m = 15
distance of dark fringe from centre if central maximum a= 9.33 cm
we know that for dark fringe distance of screen from silt is given as
[tex]L = \frac{a Y}{m \lambda}[/tex]
[tex]L = \frac{0.0933 \times 0.107 \times 10^{-3}}{15\times 696 \times 10^{-9}}[/tex]
L = 0.9562 m