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`.

What is the distance between the two points which have a phase difference of 2pi ?

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 .

A telescope has an objective lens of 10 cm diameter and is situated at a distance of 1 km from two objects.The can be resolved by the telescope, when the mean wavelength of light is 5,000 overset @A ,is of the order of

Two charges eacdh of 0.1muC but opposite in sign are 1 mm apart. What is the electric field at a point on the line joining them at a distance of 10 cm from the mid-point?

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 .

What is the magnitude of axial field due to a bar magnet of length 5 cm at a distance of 50 cm from its mid-point if its magnetic moment is 0.40 Am^2 ?

Two point white dots are 1 mm apart on a black paper.They are viewed y eye of pupil diameter 3 mm.Approximately,what is the maximum distance at which these dots can be resolved by the eye? Take wave length of light =500 nm

A beam of ligth consisting of two wavelength 4,800 overset@A and 6,000 overset@A is used to obtain interfernce fringes in a double slit experiment.The distnce between the slits is 1.8 mm and the distance of screen from the plane of slits is 1.2 m Find the distance of the third bright frings on the screen from the central maximum for the wavelength 6,000 overset @A .

A card sheet divided into squares each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 10 cm) held close to the eye. What should be the distance between the object in converging lens and the magnifying glass if the virtual image of each square in the figure is to have an area of 6.25 mm^2 . Would you be able to see the squares distinctly with your eyes very close to the magnifier ?

In Young's double slit experiment the width of the fringes obtained with ith of wavelength 4,500 overset@A is 1.8 mm.If the distance between the two slits is 0.3 mm,find the distance of the screen from the slits.What will be the fringe width,if the enitre apparatus is immersed in water of refraction index 4//3 .