Question

A sample of SF57 glass with polished, parallel sides and 2.73 cm in length is placed between the tapered poles of an electromagnet. A small central hole is drilled through the pole pieces to allow passage of a linearly polarized He-Ne laser beam through the sample and parallel to the magnetic field direction. The magnetic field is set to 5.098 kG. When red He-Ne laser light (632.8 nm) is used, the measured rotation is 900 arc min. Determine (i) the Verdet constant for the glass and (ii) the rotatory dispersion of the glass at this wavelength.

Answer 1