A Hollow Lens Is Made of Thin Glass as Shown

A hollow lens is made of thin glass as shown. It can be filled with air, water (n = 1.3) or CS₂ (n = 1.6) . The lens will diverge a beam of parallel light if it is filled with:

A) air and immersed in air
B) air and immersed in water
C) water and immersed in CS₂
D) CS₂ and immersed in water
E) CS₂ and immersed in CS₂

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