Question

Pure diamonds are:

• A. opaque to $X$-rays
• B. transparent to $X$-rays
• C. coloured
• D. colourless

Answer 1

Answer: (B), (D)

The correct options are
B transparent to $X$-rays
D colourless

The structure of diamond is shown in the figure. It can be easily observed that each carbon atom is tetrahedrally linked to four other carbon atoms, leaving no free electron to get excited and emit wavelength in the band of visible light. Hence, diamonds are colorless. Due to its high refractive properties, rays can easily pass through it. Hence B and D are the correct answer