Question

Which statement out of the following is false?

(i) prism gets disappeared when dipped in a liquid of refractive index greater than that of lens material.
(ii) prism gets disappeared when dipped in a liquid of refractive index less than that of lens material.
(iii) prism gets disappeared when dipped in a liquid of refractive index same as than that of lens material.
(iv) prism dipped in liquid never disappears

Answer 1

The false statement is that a prism dipped in liquid never disappears.

Step-by-step explanation:

The false statement out of the given options is (iv) prism dipped in liquid never disappears. Prisms are transparent objects made of glass or any other material that refracts light. When a prism is dipped in a liquid with a refractive index greater than that of the prism material, total internal reflection occurs and the prism appears to disappear (option i). Similarly, when the refractive index of the liquid is less than that of the prism material, total internal reflection again occurs, and the prism will appear to disappear (option ii). However, when the liquid has the same refractive index as the prism material, the prism does not disappear. Instead, it remains visible, and light passes through it without any major effect (option iii).

Answer 2

The false statement is (iv) prism dipped in liquid never disappears.

Step-by-step explanation:

The false statement out of the given options is (iv) prism dipped in liquid never disappears.

When a prism is dipped in a liquid of refractive index greater than that of the lens material, the prism seems to disappear because the light rays entering the prism are refracted away from the normal, causing total internal reflection. This phenomenon is known as total internal reflection.

However, if the prism is dipped in a liquid of refractive index less than that of the lens material or the same as that of the lens material, the prism will not disappear because the light rays will not experience total internal reflection.