A screen is at a distance D=80 cm from a diaphragm having two narrow slits, S1 and S2 which are d=2 mm apart. Slit S1 is covered by a transparent sheet of thickness t1=2.5 μm and S2 by another transparent sheet of thickness t2=1.25μm . sheets are made of same material having refractive index μ=1.40. Water is filled in space between diaphragm and screen. A monochromatic light beam of wavelength λ=5000 A∘ is incident normally on the diaphragm. Assuming intensity of beam to be uniform, calculate ratio of intensity of center of screen to intensity of individual slit, (μw=43)

A screen is at a distance D=80 cm from a diaphragm having two narrow s

1.	A screen is at a distance D=80 cm from a diaphragm having two narrow slits, S1 and S2 which are d=2 mm apart. Slit S1 is covered by a transparent sheet of thickness t1=2.5 μm and S2 by another transparent sheet of thickness t2=1.25μm . sheets are made of same material having refractive index μ=1.40. Water is filled in space between diaphragm and screen. A monochromatic light beam of wavelength λ=5000 A∘ is incident normally on the diaphragm. Assuming intensity of beam to be uniform, calculate ratio of intensity of center of screen to intensity of individual slit, (μw=43)
Answer» A screen is at a distance $D = 80 cm$ from a diaphragm having two narrow slits, $S_{1} a n d S_{2}$ which are $d = 2 mm$ apart. Slit $S_{1}$ is covered by a transparent sheet of thickness $t_{1} = 2.5 μ m a n d S_{2}$ by another transparent sheet of thickness $t_{2} = 1.25 μ m$ . sheets are made of same material having refractive index $μ = 1.40$ . Water is filled in space between diaphragm and screen. A monochromatic light beam of wavelength $λ = 5000 A^{\circ}$ is incident normally on the diaphragm. Assuming intensity of beam to be uniform, calculate ratio of intensity of center of screen to intensity of individual slit, $(μ_{w} = \frac{4}{3})$

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