In multimode step index fibre the refractive index of core and cladding is____________?
A convex lens of focal length f1 and a concave lens of focal length f2 are placed in contact. The focal length of the combination is_____________?
If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from______________?
The least distance of distinct vision for a normal eye is_______________?
Magnifying power of simple microscope______________?
If an object is placed away from 2f of a converging lens then the image will be_______________?
The function of collimeter in spectrometer is________________?
Errors in the transmission of power through optic fiber can be minimized by using a______________?
Magnification of the astronomical telescope is_____________?
In optic fiber transmission system _____________ are used regenerate the dim light signal?
