The equation is:
nλ=d(x/l)
where:
n is Order of maxima
λ is wavelength
d is slit separation
x is fringe separation
l is distance from screen to double slit
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yes,because in fresnel biprism the fringe width can be increased so that the dark and bright fringes can be seen clearly by naked eyes..but there is no such problem in fresnel biprism.. in young's double slit experiment, the pattern is the superposition of interference and diffraction. but in fresnel biprism it is purely interference pattern.
Youngg.
1
Ab + xy ---> ay + xb
neither is the case since diffraction involves the bending of waves upon contact or lack thereof of a physical boundary. a double slit experiment works on the basis of diffraction and also forms a distinctive interference pattern so in this case the two are related and the diffraction causes the interference but isn't necessarily a case of interference.