Question

Does focal length of a spherical mirrors changes when it is completely. immersed in the water? Predict and write the reason

Answer 1

There will be no change in mirrors focal length which is going to be immersed in water. In the spherical mirrors, the focal length will depend on the external medium to be held.

In this process, the refraction will take place when the lens is placed in water. Therefore the value of the refractive index will be decreased. So the focal length increases. Also, it is independent of water immersion.