Question

Which of the following is not a result of the phenomenon called total internal reflection?

• A. Brilliance of diamond
• B. Working of optical fibre
• C. Apparent depth of lake
• D. Mirage formation on hot summer days

Answer 1

The correct option is C Apparent depth of lake

The brilliance of diamond is achieved due to cutting angle which facilitates total internal reflection of light.

Optical fibre is used for transmission of electromagnetic waves based on total internal reflection.

Mirage is formed due to total internal reflection of light rays due to density difference of air $(\mu$ differs$)$ on account of temperature change.

The apparent depth of the lake is only due to the phenomenon of refraction at water-air interface.