An antireflection coating is designed with a thickness of a quarter of the wavelength of light traveling in the film. How many wavelengths farther does the light reflected from the bottom surface of the coating travel than that reflected from the top surface? Multiple Choice one-fifth wavelength one-sixth wavelength one-third wavelength one-half wavelength

An antireflection coating is designed with a thickness of a quarter of the wavelength of light traveling in the film. How many wavelengths farther does the light reflected from the bottom surface of the coating travel than that reflected from the top surface? Multiple Choice one-fifth wavelength one-sixth wavelength one-third wavelength one-half wavelength

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter36: Applications Of The Wave Model

Section: Chapter Questions

Problem 15PQ

See similar textbooks

Similar questions

To save money on making military aircraft invisible to radar, an inventor decides to coat them with a nonreflective material having an index of refraction of 1.20, which is between that of air and the surface of the plane. This, he reasons, should be much cheaper than designing Stealth bombers. (a) What thickness should the coating be to inhibit the reflection of 4.00-cm wavelength radar? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
Unreasonable Results To save money on making military aircraft invisible to radar, an inventor decides to coat them with a non-reflective material having an index of refraction of 1.20, which is between that of air and the surface of the plane. This, he reasons, should be much cheaper than designing Stealth bombers. (a) What thickness should the coating be to inhibit the reflection of 4.00-cm wavelength radar? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
Astronomers observe the chromosphere of the Sun with a filter that passes the red hydrogen spectral line of wavelength 656.3 nm, called the H line. The filter consists of a transparent dielectric of thickness d held between two partially aluminized glass plates. The filter is held at a constant temperature. (a) Find the minimum value of d that produces maximum transmission of perpendicular H light if the dielectric has an index of refraction of 1.378. (b) What If? If the temperature of the filter increases above the normal value, increasing its thickness, what happens to the transmitted wavelength? (c) The dielectric will also pass what near-visible wavelength? One of the glass plates is colored red to absorb this light.
In each of the following situations, a wave passes through an opening in an absorbing wall. Rank the situations in order from the one in which the wave is best described by the ray approximation to the one ill which the wave coming through the opening spreads out most nearly equally in all directions in the hemisphere beyond the wall, (a) The sound of a low whistle at 1 kHz passes through a doorway 1 m wide, (b) Red light passes through the pupil of your eye. (c) Blue light passes through the pupil of your eye. (d) The wave broadcast by an AM radio station passes through a doorway 1 m wide, (e) An x-ray passes through the space between bones in your elbow Joint.
A beam of 580-nm light passes through two closely spaced glass plates at close to normal incidence as shown in Figure P27.23. For what minimum nonzero value of the plate separation d is the transmitted light bright?
An unpolarized beam of light is incident on a stack of ideal polarizing filters. The axis of the first filter is perpendicular to the axis of the last filter in the stack. Find the fraction by which the transmitted beams intensity is reduced in the three following cases. (a) Three filters are in the stack, each with its transmission axis at 45.0 relative to the preceding filter. (b) Four filters are in the stack, each with its transmission axis at 30.0 relative to the preceding filter. (c) Seven filters are in the stack, each with its transmission axis at 15.0 relative to the preceding filter. (d) Comment on comparing the answers to parts (a), (b), and (c).
Wavelengths of Visible Light Violet 400-450 nm Blue 450-495 nm Green 495-570 nm Yellow 570-590 nm Orange 590-620 nm Red 620-700 nm Solar cells are given antireflection coatings to maximize their efficiency. Consider a silicon solar cell (n = 3.50) coated with a layer of silicon dioxide (n = 1.45) that is 241 nm thick. According to the table above, which color of light will have minimum reflection?
The wavelength of a light wave in air is 720 nm. Is the wavelength of this wave higher, lower, or the same after the light enters a piece of glass? Higher Lower The same
Light is incident from vacuum to crown glass; the light's vacuum wavelength is 500 nm, so the refractive index is 1.52 for crown glass. If the light is incident at an angle of 25.0o, what is the angle of light with respect to the normal once its has entered the crown glass? Answer in degrees.
Q: A material has an index-of-refraction that decreases with increasing frequency. EM waves at f = 1000 Hz and 1500 Hz are incident from air on the material at same incidence angle. Which frequency, if either, bends more from the path of its incident ray? Q: A light ray with 10 W/m2 intensity moving in the x-direction is polarized at 45° to both the y- and z-axes. It passes through a polarizer whose transmission axis is aligned with the y-axis. What is the intensity of the transmitted light?
What is the index of refraction of a material in which the red-light wavelength is 495 nm? Wavelength of red-light in vacuum is 692 nm.
To reduce the loss of light when reflected from the glass surface, the latter is covered with a thin layer of a substance, the refractive index of which is n '= sqrt (n), where n is the refractive index of the glass. At what minimum thickness d (min) of this layer will the reflectivity of glass in the normal direction be minimal for light with a wavelength λ?