Physics

Problem

The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability

\frac{4}{3}

for this wavelength, will be: [NCERT : PL-230 | 8 Jan. 2020 I] (a)

15^\circ

(b)

30^\circ

(c)

45^\circ

(d)

60^\circ