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Wave Optics — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
Question
The limit of resolution of eye is approximately:
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Answer

  1. 1′
Explanation:
The resolution of the human eye is the smallest object our eye can see. This is limited by the diffraction limit, which is approximated by the angular size ratio of the object's size versus the distance to the object.
The normal pupil size of a human eye is 4mm, which sets a minimum angular resolution of the eye and to able to see the small objects we bring them as close to our eyes as possible, but there is a minimum distance for comfortable viewing which is roughly at 25cm.
But quoted figure for the smallest resolvable size is 0.1mm, showing that the diffraction limit is a crucial factor in visual resolving power.

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