Two identical thin convex lenses, each having an optical power of are kept in contact with each…
Physics20253 marksNumerical
Figure 10
(i)
Two identical thin convex lenses, each having an optical power of $2\text{ D}$ are kept in contact with each other. Calculate focal length of the combination.
(ii)
Figure 10 below shows a ray of monochromatic light incident normally on first surface AB of an equilateral glass prism ABC, whose adjacent surface AC is covered with a transparent liquid. If the emergent ray grazes the surface AC, calculate refractive index of the liquid.
(Refractive index of glass = 1.5)
