Hermann Grid Illusion: This is an optical illusion named by ‘Ludimar Hermann’ in the 1800’s. The illusion is characterised by blobs perceived at the intersections of a light-coloured grid between black squares.
👇 ស្វែងរកឯកសាររៀននិងការងារគ្រប់ប្រភេទនៅទីនេះ៖
👇 ស្វែងរកពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖