What is the minimum angular separation between two stars ,if a telesope is used to observe them witha n objective of aperture 0.2 m?The wavelength of light used is `5,900 A`.

Diameter of human eye lens is 2 mm.What will be the minimum distance between two points to resolve them,which are situated at a distacne of 50 m from eye?The wavleength of ligth is 5,000 overset @A .

In Young's double slit experiment,usin light of wavelength 400 nm,interference fringes of width X are obtained .The wavelength of light is increassed to 600 nm and the separation between the slits is halved.If one wants the observed fringe width on the screen to be the same in the two caes,find the rati of the distance between the screen and the plane of the interfering sources in the two arrangements.

A small telescope has an objective lens of focal length 140 cm and an eyepiece of focal length 5.0 cm. (A) what is the separation between the objective lens and the eyepiece? (B) If this telescope is used to view a 100 m tall tower 3 km away, what is the height of the image of the tower formed by the objective lens?

Determine the angular separation betwen central maximum and first order maximum of the difraction pattern due to a single slit of width 0.25 mm,when light of wavelength 5,890 overset@A is incident on it normally.

In a Young's double slit experiment ,the distance between the slits and the screen is 1 m.If the distance between the slits is 5 mm,the fringe width is found to be 0.1 mm.Calculate the wavelength of the light used.

In a Young's double slit experiment,the fringe width obtained is 0.6 cm,when light of wavelength 4,800 overset @A is used .If the distance between the screen and the slit is reduced to half,what should be the wavelength of light used to obtain fringes 0.0045 m wide?

In a Young's double slit experiment, the slits are separated by 0.03 cm and the screen is placed 1.5 m away. The distance between the central fringe and the fourth bright fringe is 1 cm. Determine the wavelength of light used in the experiment.

In a Young 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in he experiment.

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 .