Which optical aberration increases when medieval astrolabes use small pinholes?

💡 Explanation

Increased obstruction intensifies the effect of diffraction, because the aperture size is nearly the same size scale as the wavelength of light; therefore, diffraction artifacts worsen, rather than refraction or brightness increases which need different circumstances.

• Which consequence arises if mariners misinterpret the shadow cast latitude marker on a medieval Kamal?
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