IT’S TIME FOR... OPTICAL MINERALOGY TRIVIA!!. Rules  Three rounds  10 questions per round  Pass answers to team to right for grading.

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Presentation transcript:

IT’S TIME FOR... OPTICAL MINERALOGY TRIVIA!!

Rules  Three rounds  10 questions per round  Pass answers to team to right for grading

Round 1 – Question 1 What type of energy is light?

Round 1 – Question 2 What property of light does the amplitude (A) control?

Round 1 – Question 3 The index of refraction of a particular substance is a measure of what?

Round 1 – Question 4 When the angle of incidence exceeds the critical angle of refraction, what will happen?

Round 1 – Question 5 What optical property does the mineral on the right (B) portray?

Round 1 – Question 6 A mineral in which the index of refraction (n) is the same in all vibration directions is said to portray what kind of optical properties?

Round 1 – Question 7 Name a type of crystal system that displays uniaxial optics as shown here.

Round 1 – Question 8 What is another name for the C-axis in a uniaxial indicatrix?

Round 1 – Question 9 In a positive uniaxial indicatrix will light vibrating in the ω direction be the fast or slow ray?

Round 1 – Question 10 A B C A mineral sectioned parallel to which plane (A, B, or C) in this crystal will show maximum birefringence?

End of Round 1 Pass your answers to the team on your right for grading.

Round 1 – Question 1 What type of energy is light? Electromagnetic Radiation

Round 1 – Question 2 What property of light does the amplitude (A) control? Intensity or brightness

Round 1 – Question 3 The index of refraction of a particular substance is a measure of what? How much light is slowed down (relative to the speed of light in a vacuum (or air))

Round 1 – Question 4 When the angle of incidence exceeds the critical angle of refraction, what will happen? The light will reflect

Round 1 – Question 5 What optical property does the mineral on the right (B) portray? (high) Relief

Round 1 – Question 6 A mineral in which the index of refraction (n) is the same in all vibration directions is said to portray what kind of optical properties? Isotropy

Round 1 – Question 7 Name a type of crystal system that displays uniaxial optics as shown here. Hexagonal or Tetragonal

Round 1 – Question 8 What is another name for the C-axis in a uniaxial indicatrix? Optic Axis

Round 1 – Question 9 In a positive uniaxial indicatrix will light vibrating in the ω direction be the fast or slow ray? Fast ray (lowest n)

Round 1 – Question 10 A B C A mineral sectioned parallel to which plane (A, B, or C) in this crystal will show maximum birefringence? C