Will the focal length of a lens change when it is placed in water? Elucidate
Answers
Focal length will definitely not change! Its the distance between lens plane and image plane. Its not getting changed at all.
The angle of view will decrease due to higher refraction ratio of water compared to air. This will give you impression of higher focal length.
Immerse the lens into oil (feeling sorry for the lens!), it will give you even lower angle of view. If you can afford a little costly experiment, immerse (!) the poor lens into a box of diamonds, you can have impression of even higher focal length.
Answer:
Explanation:
The focal length of a lens is very much affected when immersed in water. The reason is that the angle of refraction is dependent on the relative difference between the indices of refraction of the incoming medium and the medium of the lens. ... For a lens in air nincident is close to on