The right option for the brilliance of a diamond is (a) total internal reflection.
If the incidence angle is increased beyond the critical angle, the light rays will be totally reflected into the incident medium. This effect is called total internal reflection. Diamonds achieve their brilliance partially from total internal reflection. Because diamonds have a high refraction index (about 2.3), the critical angle for the total internal reflection is only about 25 degrees. Incident light, therefore, strikes many of the internal surfaces before it strikes one less than 25 degrees and emerges. After many such reflections, the colours in the light are separated and seen individually.
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- Total internal reflection occurs when
- Mention the Conditions Required for the Total Internal Reflection To Take Place
- Explain The Difference In Properties Of Diamond And Graphite On The Basis Of Their Structures