A pure red glass plate when placed in the path of the light absorbs everything except_____

A pure green glass plate when, placed in the path of white light, absorbs___.

A beam of light is converging towards a certain point. A parallel sided glass plate is introduced in the path of the converging beam. How will the point of convergence be shifted ?

A glass-slab is placed in the path of convergent light. The point of convergence of light_____

Wavelength of red light is absorbed by the complex

In Young's experiment, monochromatic light is used to illuminate the two slits A and B. Interference fringes are observed on a screen placed in front of the slits. Now, if a thin glass plate is placed normally in the path of the beam coming from the slit, then