Question

Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle because of the phenomenon of ______.

विकल्प

• reflection

• refraction

• total internal reflection

• dispersion

Answer 1

Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle because of the phenomenon of total internal reflection.

Explanation:

Light travelling through water can undergo total internal reflection at the water–air boundary of a bubble when it strikes at an angle greater than the critical angle. This makes the bubbles appear silvery. Ordinary reflection, refraction or dispersion does not explain this effect.