Questions & Answers about उसके चेहरे पर चमक है।
A very literal breakdown is:
- उसके = his / her / of that person
- चेहरे पर = on the face
- चमक = shine / glow / radiance
- है = is
So the sentence is literally:
On his/her face, there is a glow.
That is a very normal Hindi way to express something like His/Her face is glowing or There is a glow on his/her face.
Because Hindi possessives का / की / के agree with the noun that follows.
The base noun is चेहरा (face), which is masculine. If it were in its simple direct form, you would say:
उसका चेहरा = his/her face
But here the noun is followed by the postposition पर (on), so चेहरा has to change into its oblique form:
- चेहरा → चेहरे
Once that happens, the possessive also changes:
- उसका चेहरा
- उसके चेहरे पर
So उसके is used because चेहरे is in the oblique form.