When the light ray illustrated in the figure below passes through the glass block of index of refraction n 1.50, it is shifted laterally by the distance d. (Let L=1.95 cm and 0 = 27.0°.) (a) Find the value of d. cm (b) Find the time interval required for the light to pass through the glass block. Need Help? The index of refraction for violet light in silica flint glass is 1.66, and that for red light is 1.62. What is the angular spread of visible light passing through a prism of apex angle 60.0° if the angle of incidence is 49.00? See figure below. Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. Need Help? Angle A ray of light strikes one face of an equiangular glass prism (n = 1.51) at an angle of incidence of 36.0°. Trace the path of the light ray through the glass and find the angles of incidence and refraction at each surface. (refraction at first surface) (incidence at second surface) (refraction at second surface) A triangular glass prism with apex angle of 60.0° has an index of 1.54 (see figure below). What is refraction n the smallest angle of incidence 0, for which a light ray can emerge from the other side? Need H