Total flux produced by a source of `1 cd ` is

The luminous flux of a monochromatic source of 1 W is 450 lumen W^-1 . Find the relative luminosity at the wavelength emitted.

The luminous flux of a monochromatic source of 1 W is 450 lumen watt^-1 . Find the relative luminosity at the wavelength emitted.

The luminous flux of a monochromatic source of 1 W is 450 lumen W^-1 . Find the relative luminosity at the wavelength emitted.

An electric current can he induced in a coil by flux change produced by another coil in its vicinity or flux change produced by the same coil. In both cases, the flux through a coil is

At what distance form a light source of 64 cd, will the intensity of illumination because 4 flux ?

A circular area of radius 1.0 cm is placed at a distance of 2.0 m from a point source. The source emits light uniformly in al directions. The line joining the source to the center of the area is normal to the area. It is found that 2.0xx1^-3 lumen of luminous flux is incident on the area. Calculate the total luminous flux emitted by the source and the luminous intensity of the source along the axis of the area.

Statement-1 : Beats cannot be produced by light sources. Statement-2: Light sources have constant phase difference