Why apparent depth is less than real depth.(full answer not one line a

1.	Why apparent depth is less than real depth.(full answer not one line answer please)
Answer» Apparent depth is usually LESS than real depth because you are looking from a medium of lower optical density (air) into a medium of HIGHER optical density (water or GLASS). ... The object is in air, the OBSERVER is in glass, so this is a case in which apparent depth should be GREATER than real depth.

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