The angular position of cells remains the same for a sample of a crystal. This property is called___________________?
Correct answer: D. The external symmetry of form
- A. Isotropy
- B. Cleavage
- C. Homogeneity
- D. The external symmetry of form
Explanation
The external symmetry of form describes the repeated and consistent angular arrangement of the faces or cells of a crystal. Isotropy, the likely alternative, concerns equal physical properties in different directions, not the crystal's external angular form.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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