a$)$ Explain how a Nicol prism can be used to distinguish between polarized and unpolarized light.

b$)$ How will you find specific rotation of a given liquid using polarimeter?

c$)$ Two solutions are prepared: Solution A with a specific rotation of $+30$ degrees and Solution B with a specific rotation of $-20$ degrees. If both solutions have the same concentration, which solution will cause a greater angle of rotation in a polarimeter?