Exam 23: Wave Properties of Light

The prism totally reflects some wavelengths of light as shown, but other wavelengths pass through. The index of refraction of this prism for the longest wavelengths that are totally reflected is approximately

When taking a picture of a highly reflecting surface, it is desirable to use a polarizer in front of the camera to cut down on the "glare". Suppose you are taking a picture of a lake where the water is very still. The polarizing axis of the polarizer should ideally be oriented

As light passes from one medium into another, the angle of refraction is _____ in the medium with the _____ index of refraction and _____ speed of light.

When light is reflected from a plane surface of glass at the polarizing angle, the

In an experiment to demonstrate interference of light, it is essential that

A plane wavefront of light AA') approaches an air-water interface as shown, n < n'. The refracted wave is best represented by

Sound waves differ from light waves in many respects. One important difference is that sound waves cannot

Which of the following statements is true about the speeds of the various colors of light in glass?

You coat a glass lens n = 1.65) with MgF₂ n = 1.38) to reduce reflection. The minimum thickness of coating required to produce destructive interference in reflected light whose wavelength in air is 560 nm is

You deposit a thin film of magnesium difluoride on a glass lens n > 1.60), reducing the reflection of yellow light, at normal incidence, to a minimum. You find that the thinnest coating that accomplishes this is 106 nm thick. The index of refraction for MgF2 for yellow light λ = 585 nm) is

The minimum path difference that will produce a phase difference of 90º for light of wavelength 500 nm is

You shine light of frequency 4.00 × 10¹⁴ Hz through a glass plate whose index of refraction for this light is 1.50. The wavelength of this light in the glass is approximately

Light of wavelength 640 nm is incident perpendicularly from air onto a film 1000 nm thick and of 1.60 refractive index. When part of the light enters the film and is reflected back at the second face, the number of wavelengths contained along the path of this light in the film is

If you look at a dot on a piece of paper through a calcite crystal lying on the paper, you will see two images of the dot, one of which appears to be nearer to you than the other. From this evidence you can conclude that

The rays in the figure are reflected and refracted at the front and back surfaces of the glass. Which of the following is true of these rays?

You set two slits 30 mm apart and 50 cm from a screen. When you illuminate the slits with light of wavelength 600 nm, the distance between the second and third dark interference lines is

If we assume normal incidence, the minimum thickness of a soap film n = 1.33) in air that gives constructive interference when viewed by reflected light of wavelength 400 nm is

You set two parallel slits 0.2 mm apart at a distance of 1 m from a screen and illuminate them with light of wavelength 600 nm. The distance between a bright spot in the interference pattern and the dark spot adjacent to it is

Two side-by-side coherent light sources radiate at 450 nm. The phase difference between these two sources at a point in space is 0.333 radians. The path difference between the two sources could be

Laser light passes through a circular aperture. If it is replaced by a laser with a smaller wavelength of light, the width of the central dark fringe will