Optical Mineralogy Part 1

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By BrotherlyOctopus



50 Questions

What is the optimal thickness for a rock thin section intended for use in optical mineralogy and petrography?

It is utilized for observing interference patterns.

What is the limited wavelength range, for light visible to the naked eye?

Is it considered that light is transmitted by the vibration of particles in waves, and can the phenomena of reflection, refraction, diffraction, and interference be easily explained in accordance with this theory?

particles of light commonly referred as?

It is a surface that simultaneously represents the direction of the propagation of life energy in the same location.

A collection of light waves traveling along the same path.

It has a retardation of 147nm, and its dimensions are typically oriented in the NW-SE direction.

The direction of propagation of light is represented by a line that is perpendicular to the wavefront.

A line at any point, perpendicular to the surface of a wavefront, representing the direction of the propagation of light.

The highest point of a wave is referred to as

The lowest point of a wave is referred to as

The distance between two successive crests or troughs is known as?

The distance of a trough or crest from the line of transmission is known as

The time needed for a wave to make one complete oscillation.

controls and illuminates the light originating from the source field, directed towards the object field.

It is used to retard the light coming through the specimen.

Light that consists of a single wavelength.

The combination of all wavelengths visible to the eye.

A solution commonly used for cleaning a thin section.

Materials that exhibit the property of allowing light to pass through them with rays parallel to the wave normal and perpendicular to the wavefront

Materials that allow light to pass through them with rays not parallel to the wave normal and at an angle from the wavefront

Considering the assumption that radiating oscillators in a black body emit energy in a discontinuous manner, characterized by discrete units known as quanta.

The rate of repeated vibrations in a given time.

The ratio of the wave normal velocity in a vacuum to the wave normal velocity in a medium, irrespective of whether the medium is isotropic or anisotropic.

Filters that light and removes orange light are often referred to as.

it is the source of light

It controls the quantity of light passing through the specimen.

The component of light that lies parallel to the wavefront and perpendicular to the direction of propagation, except for anisotropic minerals.

Light constrained by a polarizing lens to vibrate in a single plane perpendicular to the direction of propagation.

The bent light passing through the medium.

The degree of visibility of a transparent mineral in an immersion medium.

When a mineral has a refractive index higher than that of the surrounding medium.

The change in color observed when a specimen is rotated at different angles.

A crystal face that is perfectly and well developed.

It exhibits elongated needle like grains.

It exhibits flat elongated grains

Exhibits long slender fibers of individual grains.

The light ray that travels in the low refractive index direction.

The amount by which the slow rays lag behind the fast ray, measured in the number of wavelengths.

Two crystal form as penetration twins.

These are the arms of interference figure.

Color of plagioclase feldspar in sodium cobaltinitrite.

Only solution where calcite will stain as no color.

In Feigl solution aragonite will stain as what color?

Solution where rhodochrosite will stain as blue.

What is the color of witherite in alizarine red solution.

what solution will smithsonite produce yellow color.

Color of k felds with solution of sodium cobaltinitrite.

It is the point where the isogyres cross and optic axis merges.


Test your knowledge on the optimal thickness for rock thin sections in optical mineralogy, the limited wavelength range for visible light, and the fundamental concepts of light transmission, reflection, refraction, diffraction, and interference. Explore the terminology related to the particles of light and the representation of the propagation of light energy.

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