When a lens of refractive index n1 is placed in a liquid of refractive index n2 the lens looks to be disappeared only if

Question

When a lens of refractive index n1 is placed in a liquid of refractive index n2 the lens looks to be disappeared only if (A) n1=n2 / 2 (B) n1=3 n2 / 4 (C) n1=n2 (D) n1=5 n2 / 4

Tardigrade Admin · Accepted Answer

If refractive index of lens n1 is equal to refractive index of liquid n2 , then lens be haves as a plane glass plate and becames invisible in the medium.

Q. When a lens of refractive index $n_{1}$ is placed in a liquid of refractive index $n_{2}$ the lens looks to be disappeared only if

$n_{1} = n_{2} /2$

$n_{1} = 3 n_{2} /4$

$n_{1} = n_{2}$

$n_{1} = 5 n_{2} /4$

If refractive index of lens $n_{1}$ is equal to refractive index of liquid $n_{2}$ , then lens be haves as a plane glass plate and becames invisible in the medium.

Q. When a lens of refractive index n1​ is placed in a liquid of refractive index n2​ the lens looks to be disappeared only if

n1​=n2​/2

n1​=3n2​/4

n1​=n2​

n1​=5n2​/4