The water in the figure above is freshwater. The index of refraction of saltwate

Question

The water in the figure above is freshwater. The index of refraction of saltwater is greater than the index of refraction of freshwater. Assuming the actual location of the fish below the water's surface remains unchanged, what happens to the apparent depth of the fish as perceived by the observer if the freshwater is replaced with saltwater? The fish is euryhaline: it can survive in both fresh and saltwater.

A) Closer to

B) Farther from

C) Unchanged relative to

The apparent location of the fish will be _____ the water's surface in saltwater than it was in freshwater.

Explanation / Answer

Refractive index = real depth / apparent depth,

or apparent depth = real depth / refractive index

So, whenever a ray of light travels from rarer medium to denser medium, the apparent depth will always be lesser than real depth.therefore the apparent location of the fish will be closer to the water's surface in saltwater than it was in freshwater.

If the fresh water is replaced by salt water ( with more refractive index), the apparent depth will be more less as compare to fresh water,

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