Which optical consequence results when viewing stars through an astrolabe's pinhole sight?

💡 Explanation

When light passes through a small aperture like an astrolabe's pinhole sight, diffraction occurs because the wave nature of light causes it to spread out, creating diffraction fringes, which blur the star's image. Therefore diffraction fringes result, rather than aberration or parallax which require lenses or near objects.

• Which outcome resulted when tin sources dwindled for Mesopotamian bronze foundries circa 2500 BCE?
• Which benefit did the ancient Chinampa raised-field cultivation technique provide relative to traditional floodplain farming?
• Which structural problem commonly afflicted 18th-century warships despite coppering efforts aimed to prevent marine biofouling?
• Which calculation enabled medieval Islamic astronomers to refine geocentric models using complex epicycles?
• Across the medieval Islamic world, which instrumental constraint limited astrolabe accuracy during astronomical observations?
• Which outcome occurred when cast iron bridge designs exceeded material tensile strength limits in the 19th century?