The width "L" of cut out circle which has diameter of 56 mm and width of 45 mm as shown is

Find the area of a sector of a circle of diameter 56 cm and central angle 45^(@) .

A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal sectors as shown in figure. Find the area of each sector of the brooch.

Light of wavelength 6000 Å is incident normally on a single slit of width 0.03 mm. Find the width of the central maxima on the screen which is at a distance 1.5 m away from the slit. What will be the width if the apparatus is immersed in water of refractive index 1.33?

In a single slit diffraction with lambda = 500 nm and a lens of diameter 0.1 mm then width of central maxima, obtain on screen at a distance of l m will be ......

Light of wavelength 500 nm is incident on a slit of width 0.1 mm. The width of the central bright line on the screen is 2 mm. The distance of the screen is

In a biprism experiment, if the width of the fourth bright bannd is 1mm, then the width of the 8th bright band will be

The width of central fringe of a diffraction pattern is 5.8 mm on a screen at a distance 2m. If light source has wavelength 5800 Å then the slit width

The width of an interference fringe is 1.5 mm . What would be the width of the fringe if the separation between the slits is made twice the original value?

The width of an aperture is 4 mm and wavelength of light illuminating it is 600 nm. Find the distance up to which ray optics is valid.

In young's double slit experiment, distance between the slits is 1mm. The fringe width is found to be 0.6 mm. When the screen is moved through a distance of 0.25 m, the fringe width becomes 0.75 mm. Find the wavelength of light used.