Exam 26: Geometrical Optics

The index of refraction for a certain material is 1.399 for red light and 1.432 for blue light. Find the angle separating the two refracted colors if the: (a) angle of incidence is 30°. (b) angle of incidence is 60°.

A beam of light that is parallel to the principal axis is incident on a convex mirror. What happens to the reflected beam of light?

For total internal reflection to take place, light must go from a medium of lower index of refraction to a medium of higher index of refraction.

A light ray enters a glass enclosed fish tank. From air it enters the glass at 20.° with respect to the surface, then emerges into the water. The index for glass is 1.50 and for water 1.33. (a) What is the angle of refraction in the glass? (b) What is the angle of refraction in the water? (c) Is there any incident angle in air for which the ray will not enter the water due to total internal reflection?

A beam of light in air is incident on a glass slab at an angle of incidence < 90°. After entering the glass slab, the beam of light

Magnification is positive for inverted images.

The index of refraction for a given material is directly proportional to the frequency of light.

An object is located 3.8 m in front of a plane mirror. The image formed by the mirror appears to be

A wave front is not a surface of constant phase within a wave.

Which of the following sets of characteristics describes the image formed by a plane mirror?

A ray of light strikes a plane mirror perpendicular to the mirror. What is the angle of reflection?

A beam of light in air enters a glass slab with an index of refraction of 1.40 at an angle of incidence of 30.0°. What is the angle of refraction?

According to the law of reflection of light, the angle of incidence is

A 3.0 cm tall statue is 24. cm in front of a concave mirror. The mirror radius of curvature is 20. cm. (a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How high is the image?

Select which statement is correct in describing the image formed by a thin lens of a real object placed in front of the lens.

An object is placed in front of a convex mirror at a distance closer than the focal length of the mirror. The image will appear

An object is placed in front of a convex mirror at a distance larger than twice the focal length of the mirror. The image will appear

What is the critical angle for light traveling from crown glass (n = 1.52) into water (n = 1.33)?

A beam of light that is parallel to the principal axis is incident on a concave mirror. What happens to the reflected beam of light?

How tall must a plane mirror be in order for you to be able to see your full image in it?