Physics
An object when placed in a denser medium and is viewed from a rarer medium appears to be at a lesser depth than real death. This is because of :
- reflection
- refraction
- dispersion
- diffraction
Refraction Plane Surfaces
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Answer
refraction
Reason — When the light from an object placed at a depth OA in water enters the air, the light bends away from the normal due to refraction. So when this light ray enters our eyes, the eyes will see the object originally situated at the depth OA at an apparent depth IA since the eyes always traces out the linear path taken by light into the water, it does not take into account that the light was refracted at the surface. So this apparent shift in depth makes us believe that the object in denser medium has been raised for an observer in a rarer medium.
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