Monochromatic lights A
are entered at points p
, respectively, on the cross section of a semi-cylinder glass, as shown above left. Point O
is the center of the cross section of the semi-cylinder glass. As shown above right, the paths of A
are parallel, and they meet the curved surface of the semi-cylinder glass with angles \(\theta_A\) and \(\theta_B\), respectively, which are the critical angles of the two monochromatic lights. Which of the following statements is correct?
The refractive index of the air is \(1\).
a) The wavelength of light A in the glass is longer than that of light B in the glass.
b) If the monochromatic light A enters at point q instead of p, then it will totally be reflected internally.
c) If a light with a shorter wavelength than the monochromatic light A is entered at point p, then it will totally be reflected internally.