A certain high-resolution screen contains individual squares known as pixels. Pixel line density is defined as the number of pixels along a 1.0 cm1.0\text{ cm}1.0 cm length of the screen.
The screen is designed so that two dark pixels separated by one light pixel cannot be resolved as separate images by the eye when viewed from a distance of 0.50 m0.50\text{ m}0.50 m.
Determine, in pixels per cm\text{pixels per cm}pixels per cm, the minimum pixel line density required for this screen.
11 exam-style questions on AQA A Level Physics Physics of the eye (A-level only), covering Physics of vision (A-level only) and Defects of vision and their correction using lenses (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.