The image appears to show a pattern of concentric circles in a spectrum of colors, likely caused by diffraction or interference. This could be an example of a phenomenon such as Newton's rings or a similar effect where light is dispersed into its constituent colors. ### Explanation of the Color Pattern: 1. Concentric Circles: The image displays several concentric circles, each showing a range of colors similar to a rainbow. 2. Color Spectrum: The colors observed range from red on the outside to violet on the inside. This gradient is similar to what is seen in a spectrum formed by a prism. 3. Cause: Such patterns can be caused by the diffraction of light, where a beam of light encounters an obstacle and spreads out. 4. Cross-Hair Lines: Two faint perpendicular lines intersect at the center, which may be part of the measuring equipment used to observe or record the diffraction pattern. ### Educational Context: - Physics: This image serves as a practical demonstration of wave optics. It provides visual evidence of how light behaves as a wave, capable of interference and diffraction. - Application: Understanding these patterns helps in various scientific fields like optics and spectroscopy, contributing to technologies such as spectrometers and optical sensors. ### Usage: Such images are often used in educational materials to illustrate basic principles of optics, particularly to explain how light can be both a particle and a wave. Question 2: What is the name for the concentric circles that appear in the interference figure for calcite? Note: There are no graphs or diagrams accompanying this text.

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

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Question

The image appears to show a pattern of concentric circles in a spectrum of colors, likely caused by diffraction or interference. This could be an example of a phenomenon such as Newton's rings or a similar effect where light is dispersed into its constituent colors.

### Explanation of the Color Pattern:

1. **Concentric Circles**: The image displays several concentric circles, each showing a range of colors similar to a rainbow.

2. **Color Spectrum**: The colors observed range from red on the outside to violet on the inside. This gradient is similar to what is seen in a spectrum formed by a prism.

3. **Cause**: Such patterns can be caused by the diffraction of light, where a beam of light encounters an obstacle and spreads out.

4. **Cross-Hair Lines**: Two faint perpendicular lines intersect at the center, which may be part of the measuring equipment used to observe or record the diffraction pattern.

### Educational Context:

- **Physics**: This image serves as a practical demonstration of wave optics. It provides visual evidence of how light behaves as a wave, capable of interference and diffraction.

- **Application**: Understanding these patterns helps in various scientific fields like optics and spectroscopy, contributing to technologies such as spectrometers and optical sensors.

### Usage:

Such images are often used in educational materials to illustrate basic principles of optics, particularly to explain how light can be both a particle and a wave.

Expert Solution

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A uniaxial flash figure is the name given to the interference figure for calcite. This is due to the fact that calcite only has one optic axis, making it a uniaxial mineral. A flash figure is created when a uniaxial mineral is arranged so that its optic axis is perpendicular to the polarizers of a petrographic microscope. This figure is made up of a black cross surrounded by a row of concentric rings that alternate in color from violet to red in the center outward.