Suppose we rotate the second sheet in Fig. 33-15a, starting with the polarization direction aligned with the y axis(θ=00)and ending with it aligned with the x-axis(θ=90°). Which of the four curves in Fig. 33-26 best shows the intensity of the light through the three-sheet system during this90°rotation?

Short Answer

Expert verified

The curve ‘c’ best shows the intensity of light emerging from the system.

Step by step solution

01

The given data

The polarization direction of the second sheet changes from initially aligned with y axis θ=00 to finally aligned with x axisθ=900 .

02

Understanding the concept of intensity of polarization

By passing it through a polarizing filter or other polarizing substance, light can be made polarized. The cosine-square rule can be used to calculate the intensity of unpolarized light after it has gone through a polarizing filter. Here, we must apply the polarization principle utilizing polarizing sheets. The polarizing direction also shifts as we rotate the sheet because of its angle with the incident rays. As a result, the intensity of that sheet likewise changes.

03

Calculation for the curve representing best intensity of light through the three-sheeted system

The polarization direction of second sheet is aligned with the y axis initially. So, the direction of polarization for first two sheets will be same and the third sheet crossed with them. Hence, there will be no light emerging resulting zero intensity.

In a similar way, as finally the second sheet has polarization direction aligned with x axis, crossed with first polarizing sheet, resulting zero intensity.

It means the curve which is at zero at initial and final position, is the best representation of the intensity of light emerging from the system.

Hence, the curve ‘c’ best represents the intensity of the light emerging through the system.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Someone plans to float a small, totally absorbing sphere 0.500m above an isotropic point source of light so that the upward radiation force from the light matches the downward gravitational force on the sphere. The sphere’s density is 19.0 g/cm3, and its radius is 2.00mm. (a) What power would be required of the light source? (b) Even if such a source were made, why would the support of the sphere be unstable?

Question: Frank D. Drake, an investigator in the SETI (Search for Extra-Terrestrial Intelligence) program, once said that the large radio telescope in Arecibo, Puerto Rico (Fig.33-36), “can detect a signal which lays down on the entire surface of the earth a power of only one picowatt.” (a) What is the power that would be received by the Arecibo antenna for such a signal? The antenna diameter is 300m.(b) What would be the power of an isotropic source at the center of our galaxy that could provide such a signal? The galactic center is 2.2×104lyaway. A light-year is the distance light travels in one year.

An electromagnetic wave is traveling in the negative direction of ay-axis. At a particular position and time, the electric field is directed along the positive direction of thez-axis and has a magnitude of 100V/m. What are the (a) magnitude and (b) direction of the corresponding magnetic field?

In Fig. 33-78, where n1=1.70, n2=1.50,andn3=1.30,light refracts from material 1 into material 2. If it is incident at point A at the critical angle for the interface between materials 2 and 3, what are (a) the angle of refraction at pointBand (b) the initialangleθ?If, instead, light is incident atBat the critical angle for the interface between materials 2 and 3, what are (c) the angle of refraction at pointAand (d) the initial angleθ? If, instead of all that, light is incident at point Aat Brewster’s angle for the interface between materials 2 and 3, what are (e) the angle of refraction at point B and (f) the initialangleθ?

If the magnetic field of a light wave oscillates parallel to a y axis and is given byBy=Bmsin(kz-ωt), (a) in what direction does the wave travel and (b) parallel to which axis does the associated electric field oscillate?

See all solutions

Recommended explanations on Physics Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free