A concave mirror and a converging lens have the same focal length in a...
Concave mirror supposed have X length and convex lens have Y length when it immerged in water there is no change in focal length of them for a particular point because medium cannot make effect on there length.
A concave mirror and a converging lens have the same focal length in a...
Concave Mirror vs. Converging Lens in Water
When a concave mirror and a converging lens have the same focal length in air, the situation changes when they are immersed in water due to the different refractive indices of air and water.
Concave Mirror Immersed in Water
- When a concave mirror is immersed in water, its focal length increases compared to when it is in air.
- This is because the refractive index of water is higher than that of air, leading to a change in the effective focal length of the concave mirror.
Converging Lens Immersed in Water
- Similarly, when a converging lens is immersed in water, its focal length also increases compared to when it is in air.
- The change in refractive index from air to water causes the converging lens to have a greater effective focal length in water.
Reasoning
- The change in focal length for both the concave mirror and the converging lens when immersed in water is due to the difference in refractive indices between air and water.
- The higher refractive index of water causes light rays to bend more when passing through the medium, effectively changing the focal length of optical elements immersed in water.
In conclusion, when a concave mirror and a converging lens have the same focal length in air, they will both have a greater focal length when immersed in water due to the change in refractive index of the medium.