An object is immersed in a fluid. In order that the object becomes invisible, it should

Question

An object is immersed in a fluid. In order that the object becomes invisible, it should (A) behave as a perfect reflector (B) absorb all light falling on it (C) have refractive index one (D) have refractive index exactly matching with that of the surrounding fluid

Tardigrade Admin · Accepted Answer

When a thin transparent plate of mica is introduced is the path of one of the two <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/0182bce3bb2ae472c19bde764783b7dd-.png" /> interfering light beams (as shown) then the entire fringe pattern is displaced towards the beam in the path of which the plate is introduced, but the fringe width is not changed.

Q. An object is immersed in a fluid. In order that the object becomes invisible, it should

behave as a perfect reflector

absorb all light falling on it

have refractive index one

have refractive index exactly matching with that of the surrounding fluid

When a thin transparent plate of mica is introduced is the path of one of the two

interfering light beams (as shown) then the entire fringe pattern is displaced towards the beam in the path of which the plate is introduced, but the fringe width is not changed.

Q. An object is immersed in a fluid. In order that the object becomes invisible, it should

behave as a perfect reflector

absorb all light falling on it

have refractive index one

have refractive index exactly matching with that of the surrounding fluid

When a thin transparent plate of mica is introduced is the path of one of the two interfering light beams (as shown) then the entire fringe pattern is displaced towards the beam in the path of which the plate is introduced, but the fringe width is not changed.

When a thin transparent plate of mica is introduced is the path of one of the two

interfering light beams (as shown) then the entire fringe pattern is displaced towards the beam in the path of which the plate is introduced, but the fringe width is not changed.