Two identical equi-concave lenses made of magnitude of combined glass of refractive index 1.5, placed in contact has magnitude of combined power p. when a liquid of refractive index mu is filled in the gap between the concave lenses, the power becomes +p/3. the value of mu is K/3. find the value of K

Two identical equi-concave lenses made of magnitude of combined glass

1.	Two identical equi-concave lenses made of magnitude of combined glass of refractive index 1.5, placed in contact has magnitude of combined power p. when a liquid of refractive index mu is filled in the gap between the concave lenses, the power becomes +p/3. the value of mu is K/3. find the value of K
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