Hmm, I got that the wavelength is 500 meters.
Solution :
Given :
Wavelength of the thin beam of light, λ = 50 μm
Distance of the screen from the slit, D = 3.00 m
Width of the fringe, Δy = ±8.24 mm
Therefore, width of the slit is given by :


= 0.000018203 m
= 0.0182 mm
= 0.018 mm
The intensity of light is given by :
, where 


Now, 
= 0.1854
≈ 0.18


= 2 x0.81

It grows every time it needs to grow for the population of the environment
Answer:
When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall. (i) Name the force exerted ...