Wave Optics Tes...

A source S is kept directly behind the slit $$S$$ , in a double-slit apparatus. Find the phase difference at a point $$O$$which is equidistant from $$s 1 8$$ s2 What will be the phase difference at $$\mathrm { P }$$ if a liquid of refraction index $$\mu$$ is filled. (wavelength of light in air is $$/$$ due to the source)$$( \lambda  < < d , d < < D , \langle > > d )$$

Angle of polarization depends on 

Select the incorrect statement

Coherent sources can be obtained:

The ratio of the maximum and minimum intensities in the interference pattern is pattern produced by two coherent sources of light is 9:1.the intensity of used light?

In YDSE, the spacing between the slits is d and wavelength of light used is 6000 A. If the angular width of a fringle formed on a distant screen is $$1^o$$, then value of d is

In a YDSE bichromatic light of wavelength $$400nm$$ and $$560nm$$ are used. The distance between the slits is $$0.1mm$$ and the distance between the plane of the slits and the screen is $$1m$$. The minimum distance between two successive regions of complete darkness is

In a standard YDSE setup, the fringe width on the screen is 1.5 mm. When a thin glass film is pasted in front of the upper slit, the fringe pattern shifts up. But it is seen that at a point P above central maxima where intensity was one fourth the intensity at central maxima, intensity remains the same. There were no maxima between central maxima and point P before film was introduced. What can be the thickness of the film? Take $$\mu$$ = 1.5, $$\lambda$$ = 450 nm :-

In Y.D.S.E. the fringe width is 0.2 mm. If wavelength of light is increases by 10% and separation between the slits is increases by 10% then fringe width will be:

Particle nature and wave nature of electomagnetic waves can be shown by