Refractometer

What's the name of the object indicated by an orange arrow?

• Lens

• Eyepiece

• Ocular

• Magnifier

What's the name of the object indicated by the green arrow?

• Cap

• Lid

• Top

• Hood

What's the name of the stones in the image?

Can we analyse a stone if it is set in jewelry?

• Yes, always.

• No, never.

• Only if it is a diamond.

• yes, as long as the surface can make contact with the prism.

In which situation do we have an angle of refraction greater than the angle of incidence?

Describe what is a critical angle

Which ray does the refractometer measure?

• The total reflection of the light ray

• The angle of reflection

• The angle of incidence

• Both reflection and incidence angles

Which light is the best to use with the refractometer

• Sun light

• Light from a xenon bulb

• Yellow light

• Orange light

In the refractometer is the prism denser or lighter than the stone?

• The prism is denser

• The prism is lighter

Which is the purpose of di-idiomethane and tetraidiomethylene?