Diamonds

Q.

A cut piece of diamond appears to sparkle much more than an identically cut piece of glass. Why?

1. Because Diamond, unlike glass, has smaller critical angle and hence is a poor reflector of Light

2. Because Diamond, unlike glass, has smaller critical angle and hence is a poor reflector of Light

3. Because Diamond, unlike glass, has smaller critical angle and hence is a better reflector of Light

4. Because Diamond, unlike glass, has larger critical angle and hence is a better reflector of Light

5. Because although Diamond and glass, has same critical angle, Diamond has a higher Refractive Index.

Q.

A cut diamond sparkles because of its ___ .

1. Absorption of light by the diamond

2. Hardness

3. High refractive index

4. Emission of light by the diamond

Q. A finely cut diamond sparkles because of its ________ .

1. high refractive index
2. emission of light
3. absorption of light
4. hardness

Q. The refractive index of diamond is much greater than that of ordinary glass. Is this fact of some use to a diamond-cutter? [3 MARKS]