- #1
kusal
- 21
- 0
Glass lenses behave in the way it is expected to behave when the medium they are in is a vacuum or air. But if the medium is also glass it obviously doesn’t work as a lens. If the density of the medium is higher than that of glass the lens works in the opposite way.
The power of a lens depends on the medium it is in. So if we consider a lens that’s sunk in water it’s not as powerful as it was when the medium was air.
The power of a lens= 1/focal length
When the power decrease the focal lens should increase.
But as “2F=C” the c should also increase.
Yet c is defined as “The radius of the glass sphere that was used to make the lens”
If the definition is correct C cannot be changed.
Either the definition is wrong or the principals we use to specify the path of rays of light are only valid when the medium is air or a vacuum.
The power of a lens depends on the medium it is in. So if we consider a lens that’s sunk in water it’s not as powerful as it was when the medium was air.
The power of a lens= 1/focal length
When the power decrease the focal lens should increase.
But as “2F=C” the c should also increase.
Yet c is defined as “The radius of the glass sphere that was used to make the lens”
If the definition is correct C cannot be changed.
Either the definition is wrong or the principals we use to specify the path of rays of light are only valid when the medium is air or a vacuum.