4. A hemispherical converging lens (in air) of radius 12 cm and refractive index of 2.0 is 36 cm from an axial (i.e., located on the optical axis) point object. (a) What is the power of the lens? (b) Locate the principal and focal point locations (i.e., a,b, f,), f,). (c) Locate the image and describe it (i.e., v, m, real/virtual) using the thick lens method.

4. A hemispherical converging lens (in air) of radius 12 cm and refractive index of 2.0 is 36 cm from an axial (i.e., located on the optical axis) point object. (a) What is the power of the lens? (b) Locate the principal and focal point locations (i.e., a,b, f,), f,). (c) Locate the image and describe it (i.e., v, m, real/virtual) using the thick lens method.