Qstnid -A-7- Show By A Diagram, The Refraction Of Two Light Rays Incident Parallel To The Principal Axis On A Concave Lens By Treating It As A Combination Of A Glass Block And Two Triangular Glass Prisms. - 05: Refraction Through A Lens

with Solutions -

#7
Show by a diagram, the refraction of two light rays incident parallel to the principal axis on a concave lens by treating it as a combination of a glass block and two triangular glass prisms.
Ans : 7

As shown in the figure the concave lens has two glass prisms and one glass block. One of the glass prisms is situated above the glass block and one below the block.