Exam 33: The Nature and Propagation of Light

An optic fiber is made of clear plastic with index of refraction of 1.50,surrounded by air.For what angles of incidence θ will light remain within the plastic fiber?

The speed of light in a material is What is the critical angle of a light ray at the interface between the material and a vacuum?

The critical angle for an air-glass interface is 29.6°.When a light ray in air is incident on the interface,the reflected ray is 100% polarized.What is the angle of refraction of that ray?

A ray of light consisting of blue light (wavelength 480 nm)and red light (wavelength 670 nm)is incident on a thick piece of glass at 80°.What is the angular separation between the refracted red and refracted blue beams while they are in the glass? (The respective indices of refraction for the blue light and the red light are 1.4636 and 1.4561.)

Light of intensity I₀ and polarized horizontally passes through three polarizes.The first and third polarizing axes are horizontal,but the second one is oriented 20.0° to the horizontal.In terms of I₀,what is the intensity of the light that passes through the set of polarizers?

The critical angle in air for a particular type of glass is 39.0°.What is the speed of light in this class glass? (c = 3.00 × 10⁸ m/s)

Light strikes a 5.0-cm thick sheet of glass at an angle of incidence in air of 50°.The sheet has parallel faces and the glass has an index of refraction 1.50. (a)What is the angle of refraction in the glass? (b)After traveling through the glass the light re-emerges into the air.What is the final angle of refraction in air? (c)As it leaves the glass,by what distance is the path of the ray is displaced from what it was before entering the glass?

A tank holds a 1.44-m thick layer of oil that floats on a 0.96-m thick layer of brine.Both liquids are clear and do not intermix.Point O is at the bottom of the tank,on a vertical axis.The indices of refraction of the oil and the brine are 1.40 and 1.52,respectively.A ray originating at O reaches the brine-oil interface at the critical angle.What is the distance of this point from the axis?