Diffraction pattern of a single width 0.5 cm is formed by a lens of a focal length 40 cm. Calculate the distance between the first dark and next bright fringe from the axis. `lambda = 4890 overset@A` (given)

A real image is obtained at 30 cm from a convex lens of focal length 7.5 cm .Find the distance of the object from tne lens .

A lens of focal length f gives diffraction pattern of Fraunhoffer type of a slit having width a. If wavelength of light is lambda , the distance of first dark band and next bright band from axis is given by

An image is formed 5 cm behind a convex mirror of focal length 10 cm. At what distance is the object placed from the mirror?

An image is formed 5 cm behind a convex mirror of focal length 10 cm. At what distance is the object placed from the mirror?

In a single slit diffraction pattern, the distance between the 1st minima on the right and the 1st minima on the left is 5.2 mm. The screen on which the pattern is displayed is 80 cm from the slit. If lambda= 5460 overset@A . Calculate the slit width.

5 cm high object is placed at a distance of 25 cm from a converging lens of focal length 10 cm. Determine the position ,size and type or the image.

An arrow of 2.5 cm height is placed at a distance of 25 cm from a diverging mirror of focal length 20 cm. Find the nature, poistion and size of the image formed.

A short magnetic dipoles has magnetic moment 0.5 Am^2 . Calculate its magnetic field at a distance of 20cm from the center of magnetic dipole on the axis.

The distance between an object and the screen is 75 cm. When a convex lens of focal length 12 cm is placed in the between theobject and the screen, magnification of real formed can be (magnitude only)

A point object is placed on the axis of a thin convex lens of focal length 0.05 m at a distance of 0.2 m from the lens and its image is formed on the axis. If the object is now made to oscillate along the axis with a small amplitude of A cm, then what is the amplitude of oscillation of the image? [you may assume, frac(1)(1 + x ~~ 1 - x , where x << 1]