Two slits separated by d emit light of wavelength λ. Angular separation of fringes:
Aλ/d (small-angle: β/D = λ/d)
Bd/λ
Cλ × d
DIndependent of d
Answer & Solution
Correct answer: A. λ/d (small-angle: β/D = λ/d)
Angular fringe separation = β/D = λ/d. Smaller d gives wider angular spread of fringes. (Inverse relation: small slit separation produces widely spaced fringes.)
Related questions
Blue sky seen through a rotating polaroid rises and falls in brightness. Sky light is:Two polaroids are set crossed. The light passing through both is:Ordinary lamp light passes through one polaroid. Its intensity drops to:Wiggle a string up and down and a wave runs along it. The displacement is at right angles The rainbow of colours you see on a CD comes from:Diffraction is shown by:Near the edge of a shadow you see alternate dark and bright bands. This is:In Young's pattern, consecutive bright fringes are: