A concave mirror has the form of a hemis...

A concave mirror has the form of a hemisphere with a radius of `R=60cm` A thin layer of an unknown transparent liquid is poured into the mirror ,The mirror-liquids system forms one real Image and another real image is formed by mirror alone ,with the sources in a certain position .One of them coincides with the source and the other is at distance of `l=30 cm` from source.find the possible value(s) refractive index `mu`of the liquid.

Verified by Experts

The correct Answer is:

`1.5` or `(sqrt(5)-1)`

GEOMETRICAL OPTICS
MOTION|Exercise Exercise 3 Level - II (Section K - Lens Maker formula and Magnification, Image formation by convex and concave lens, Combination of lens, Cutting of lens)|3 Videos
GEOMETRICAL OPTICS
MOTION|Exercise EXERCISE - 3 Level II (Section L - Power of lens and Mirror, Silverging of lens, Displacement Method)|3 Videos
GEOMETRICAL OPTICS
MOTION|Exercise Exercise 3 Level - II (Section H - Prism )|2 Videos
FLUID
MOTION|Exercise Exercise-4 level-II|5 Videos
GRAVITATION
MOTION|Exercise Exercise - 4 Section - B Previous Years Problems|15 Videos

A concave mirror forms an image of the sun at a distance of 12 cm from it.

the radius of curvature of this mirror is 6cm

to use it as a shaving mirro, it can be held at a distance of 8-10cm from the face

it an object is kept at a distance of 24cm from it, the image formed will be of the same size as the object

all the above alternative are correct.

between centre of curvature and focus

at a distance greater than radius of curvature

at a distance equal to radius of curvature

at a distance equal to focal length