Physics · 2022
JEE Main · 24 June 2022, Shift 1 · Q52
Two identical thin biconvex lenses of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is…
Two identical thin biconvex lenses of focal length $\displaystyle 15$ cm and refractive index $\displaystyle 1.5$ are in contact with each other. The space between the lenses is filled with a liquid of refractive index 1.25. The focal length of the combination is \_\_\_\_ cm.
Official answer
10
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.