A coin kept in a bowl is not visible when seen from one side . But , when water is poured in the bowl the coin becomes visible.
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158
Answer:
When water is poured in the bowl, the rays of light coming from the coin travel from water (denser medim ) to air (rarer medium). Hence , they bend away from the normal on refraction. Therefore the coin appears to be raised and becomes visible when observed from on e side of the bowl.
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41
Answer:
This is because of the apparent dept of the coin. when water is put in the vessel, then the coin appears to be coming up but actually it doesn't come up, it is all because when the ray comes out from the coin towards our eyes, the ray bends away from the normal and it reaches our eyes. Then the ray is forwarded towards the water and where the two ray meets, it forms a apparent dept of the coin.
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