Wave Optics Tes...

A thin slice is cut of glass cylinder along a plane parallel to its axis. The slice is placed on a flat glass plate with the curved sirface sownwards. Monochromatic light is incident normally from the top. the observed interfernce fringes from the combination do not follow on of the following staements. 

Two slits in Young's double-slit experiment have widths in the ratio 9 : 4.Find the ratio of light intensities at maxima and minima in the interference pattern:

In the figure shown if a particle beam of white light is incident on the plane of the slits then the distance of the white spot on the screen from$$O$$ is [Assume $$d <  < D,\lambda  <  < d$$ ]

In $$YDSE,d=2\ mm,D=2\ m$$ and $$\lambda=500\ nm$$. If intensity of two slits are $$l_{0}$$ and $$9l_{0}$$ then find intensity at $$y=\dfrac {1}{6}\ mm$$.

Intensity of central fringe in interference pattern is $$0.1  W/m^2$$ then find intensity at a point having path difference $$\lambda /3$$ on screen from centre ( in $$m W /m^2$$) :

If the ratio of the intensity of two coherent source s is $$4$$ then the visibility $$[( I_{max} -I_{min} )/ ( I_{ max} + I_{min} ) ]$$ of the fringes is

If in a Young's double slit experiment, the slit distance is $$3\ cm$$, the separation between slits and screen is $$70cm$$ and wavelength of light is $$1000\ A^{o}$$, then fringe width will be $$(\alpha=1^{o}, \mu=1.5)$$ 

White light containg radiations of wevelenght $$420nm$$ to $$700 nm$$ is used in a Youngs double slit experiment as shown in figure. Which wavelength is completely absent at $$p$$?

In a $$YDSE,$$ $$\lambda  = 6000\mathop A\limits^0 ,$$ $$D=2m,$$ $$d=6mm,$$ when a film of refractive index $$1.5$$ is introduced in front of the lower slit$$,$$ the third maxima shifts to the origin. Find the thickness of the film. Find the position of the fourth maxima.

In a double slit experiment, sodium light of wavelength 589 nm produces fringes spaced 1.8 mm on a screen. If the source is replaced by another one of wavelength 436 nm the fringe spacing is :