Respuesta :
Answer: no, the magnifying glass has nothing to do with the speed of light.
Explanation: When light moves between 2 media (refraction), part of it properties that changes during this process is it speed.
The change in speed is dependent on the refractive index of the 2 media and as given by snell's law, the refractive index is inversely proportional to wave speed.
This implies that moving from dense to a more dense medium reduces wave speed and moving from dense to less dense medium increases wave speed.
For the first statement, light moved from glass to water, it implies that it moves from a dense to a less dense medium, it wave speed increases in water.
For the second statement, light moved from glass to air, it implies that it also moves from a dense to a less dense medium and it wave speed will also increase in air.
Looking at both second medium, for the first statement, the second medium is water, and for the second statement, the second medium is air.
Air is less dense that water, hence light travel faster in air than in water.
Thus we can see that the magnification property of a glass has nothing to do with the wave speed, just the refractive indices of the media.
The magnification of glass is not affected when used underwater.
Refraction and magnification:
When light travels from one medium to another it gets refracted because the speed of light is different for different mediums.
The change in speed is dependent on the refractive index of the media and as given by snell's law, the refractive index is inversely proportional to the speed of light.
Air is less dense than water, hence light travel faster in the air than in water. The same goes for glass.
But the refractive index of glass relative to water is less different which means the speed of light in glass relative to that in water differs lesser than with the air, but this does not change the refractive index of glass with respect to air.
Therefore, there will be no change in magnifying power of the glass when used underwater.
Learn more about refraction:
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