Underwater Mirror
A small object is placed before a concave mirror at a fixed distance from the mirror.
When this apparatus is kept in air, the image is formed at distance
from the mirror.
When this apparatus is submerged in water, the image is formed at distance
from the mirror.
How does compare with ?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
Focal length(f) of a concave/convex mirror is half of its radius of curvature.
Since radius of curvature remains same in any medium, the focal length also remains unchanged.
Since object distance(u) is fixed and focal length is constant,by mirror formula, v 1 = f 1 − u 1 , where v is image distance.
Thus image distance is also constant in any medium.
Note This need'nt be true in case of lens.