A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is (refractive index of water `=1.33`)
A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is (refractive index of water `=1.33`)
A. equal to unity
B. equal to `1.33`
C. between unity and `1.33`
D. greater than `1.33`
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Correct Answer - D
Lens changes its behaviour if `R`.`I`. Of surrounding becomes greater than `R`.`I`. Of lens. `mu_("lens")lt1.33`
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