/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q20CQ A beam of light always spreads o... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 27: Q20CQ (page 995)

A beam of light always spreads out. Why can a beam not be created with parallel rays to prevent spreading? Why can lenses, mirrors, or apertures not be used to correct the spreading?

Short Answer

Expert verified

The light will begin to spread out and will no longer be parallel. One can't use any lens, mirror, or aperture to rectify spreading for the same reason.

Step by step solution

01

Define parallel rays

Two rays point in the same direction and are on the same line or parallel lines.

02

Explanation

The secondary sources of the wavefront of the light will transmit light in all directions if we generate a parallel beam. As a result, the light will begin to spread out and will no longer be parallel.

One can't use any lens, mirror, or aperture to rectify spreading for the same reason.

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 91影视!

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

(a) The planet Pluto and its Moon Charon are separated by \(19,600{\rm{ }}km\). Neglecting atmospheric effects, should the \(5.08 - m\)-diameter Mount Palomar telescope be able to resolve these bodies when they are \(4.50 \times {10^9}{\rm{ }}km\) from Earth? Assume an average wavelength of \(550{\rm{ }}nm\).

(b) In actuality, it is just barely possible to discern that Pluto and Charon are separate bodies using an Earth-based telescope. What are the reasons for this?

Can the lines in a diffraction grating be too close together to be useful as a spectroscopic tool for visible light? If so, what type of EM radiation would the grating be suitable for? Explain.

Suppose pure-wavelength light falls on a diffraction grating. What happens to the interference pattern if the same light falls on a grating that has more lines per centimeter? What happens to the interference pattern if a longer-wavelength light falls on the same grating? Explain how these two effects are consistent in terms of the relationship of wavelength to the distance between slits.

Consider difdfraction limits for an electromagnetic wave interacting with a circular object. Construct a problem in which you calculate the limit of angular resolution with a device, using this circular object (such as a lens, mirror, or antenna) to make observations. Also calculate the limit to spatial resolution (such as the size of features observable on the Moon) for observations at a specific distance from the device. Among the things to be considered are the wavelength of electromagnetic radiation used, the size of the circular object, and the distance to the system or phenomenon being observed

What are the advantages of a diffraction grating over a prism in dispersing light for spectral analysis?
See all solutions

Recommended explanations on Physics Textbooks

Rotational Dynamics

Read Explanation

Work Energy and Power

Read Explanation

Measurements

Read Explanation

Radiation

Read Explanation

Electromagnetism

Read Explanation

Translational Dynamics

Read Explanation
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.