Soil And Glass

Question 1

Define the terms ‘radial’ and ‘concentric’ cracks

Answer 1

RADIAL - form on the side of the glass opposition to the side of impact

CONCENTRIC - appear on the side of Impact

Question 2

Describe the refractive index of glass

Answer 2

• ratio of the velocity of the light in a vacuum to the velocity as it passes through the medium

N = velocity of light in vacuum / velocity of light in medium

Question 3

Define the term ‘glass’

Answer 3

Amorphous solid that lacks the ordered arrangement in a crystalline lattice

Question 4

Describe the Becke line immersion method

Answer 4

• piece of glass immersed in liquid with RI matching the glass than glass should be invisible
• piece of glass immersed in liquid with RI not matching the glass a bright halo appears