Calculation of Focal Length for Combination of Mirror and Lens
Physics
example
Different refractive indices on the sides of a lens
Example: A thin convex lens made of glass of μ= 1.5 has refracting surfaces of radii of curvature 10 cm each The left space of lens contains air and right space is filled with water of refractive index 34. A parallel beam of light is incident on it. The position of image is Solution: μa=1,μg=1.5,μw=1.33,R1=10cm,R2=−10cm,u=∞Using the relation vμw+uμa=R1μg−μa−R2μw−μg v1.33=101.5−1−101.33−1.5 v=0.671.33×10=20cm