Which outcome impairs digital holography when a surface lacks optical flatness?

💡 Explanation

Speckle noise arises because surface irregularities cause interference from points with varying path lengths; optical coherence is needed but disrupted, therefore speckle noise masks the hologram, rather than aberration or altered polarization shifts which have different causes.

• Which consequence is observed due to gravitational influence on spacetime?
• Which phenomenon reduces laminar combustion stability when the dimensionless Damköhler number falls below unity?
• Which image distortion results when coherent light reflects imperfections?
• Which mechanism determines oil film thickness in hydrodynamic bearings?
• Which risk increases when a turbocharger cycle overspeeds?
• Which consequence results when a gravitational wave interacts strongly with spacetime?