In a certain region in a thin film 10 fringes are observed in the relfection of `lambda=4200overset@A`. How many fringes will be obeserved in the same region with `lambda=6000overset@A`?

In a certain region A to B in a thin film,we get 10 fringes with lith of wavelendth 4,125 overset@A .HOw many fringes will be obeserved in the same region with waveength 5,893 overset @A ?

In Yound's double slit experiment,wer get 15 fringes per cm on the screen,while using light of wavelength 5,600 overset @A (sodium lamp).How many fringes per cm we get with ligth of wavelength 7,000 overset@A ?

Two parallel slits used for Young's interference experiment are .5 mm apart.The screen on which fringes are projected is 1.5 m from the slits . How far is the third dark fringe from the central bright one? Wavelength of light used is 6,000 overset@A .

The fringe width in a Young's double slit inter pattern is 2.4 xx 10^(-4)m ,when a red ligth of wavelength 6,400 overset @A is used.By how much will it change,if blue ligth of wavelength 4,000 overset@A is used?

Lenses are often coated with a thin film to reduce the intesntiy of reflected light. If the index of refraction of the coating is 1.3 ,what is the smallest thickness that wilo give minimum relfaction of yello light (lambda=5,800 overset@A) ?

Monochromatic ligth of wavelgth 6,000 overset @A is used in a Young's double slit experiment.One of the slits is covered by a transparent film of thickness 1.2 xx 10^(-5) m having refractive index 1.4.How many fringes will shift due to the introduction of the film?

In Young's doule slit experiment,the slits are 3 m from the screen.The width of the fringes observed with ilght of wavelength 6,000 overset @A is 2 mm.What is the separation of the slits?

In a Young's double slit experimnet,red ligth of wavelength 6,000 overset @A is used and the nth bright fringe is obtained at a point P n the screen .Keeping the same setting,the source is replaced by green light of 5,000 overset@A and now (n+1) th brigth fringe is obtained at the point P .Calculate the value of n.

The fringe width in a Young.s double slit interference pattern is 2.4 xx 10^(-4) m, when red light of wavelength 6400 overset@A is used. By how much will it change,if blue light of wavelength 4000 overset@A is used?

Using light of wavelength 6,000 overset@A ,it is found that in a thin film of air,7 fringes occur between two points,deduce the difference of the film thickness between these points.