A swimming pool is 2.7 m deep. How deep does it seem when you look straight down into it? …
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A swimming pool is deep. How deep does it seem when you look straight down into it? The refractive index of water is .
Need a reminder? The key ideaShow
A ray through a glass slab leaves parallel to the way it came (), shifted sideways by the lateral displacement . Looking straight down into water, : things look shallower.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The rule. , so apparent depth .
Step 2. Put in the numbers. Apparent depth .
Answer: about .
Check. The pool looks shallower than it is, by about . Take care before you jump.
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