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Chapter 27: Q4CQ (page 994)

Under what conditions can light be modeled like a ray? Like a wave?

Short Answer

Expert verified

Light may be described both as a wave and as a ray.

Step by step solution

01

Concept Introduction

Conditions that describe that the light can be modeled as a wave, a ray, or both of them, completely depend on the properties it depicts.

02

Explanation

Light may be portrayed in two ways in our scenario.

In the first case, light can be modeled to be a ray, when the object size is substantially larger than the light's wavelength, the diffraction effect will be negligible.

In the second method, the light can be modeled as a wave, when the aperture or object size is equivalent to the wavelength of light and we can see a beautiful diffraction pattern.

The best example, where the light can be modeled as a ray is described in the photoelectric effect, which resulted in a Nobel Prize in Physics in the year of 1921.

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Most popular questions from this chapter

(a) If the first-order maximum for pure-wavelength light falling on a double slit is at an angle of 10.00 , at what angle is the second-order maximum? (b) What is the angle of the first minimum? (c) What is the highest-order maximum possible here?

Young鈥檚 double slit experiment breaks a single light beam into two sources. Would the same pattern be obtained for two independent sources of light, such as the headlights of a distant car? Explain.

A telescope can be used to enlarge the diameter of a laser beam and limit difddfraction spreading. The laser beam is sent through the telescope in opposite the normal direction and can then be projected onto a satellite or the Moon.

(a) If this is done with the Mount Wilson telescope, producing a \(2.54 - m\) diameter beam of \(633 - nm\) light, what is the minimum angular spread of the beam?

(b) Neglecting atmospheric effects, what is the size of the spot this beam would make on the Moon, assuming a lunar distance of \(3.84 \times {10^8}{\rm{ }}m\)?

Explain what happens to the energy carried by light that it is dimmed by passing it through two crossed polarizing filters.

An electric current through hydrogen gas produces several distinct wavelengths of visible light. What are the wavelengths of the hydrogen spectrum, if they form first-order maxima at angles of24.2鈭�,25.7鈭�,29.1鈭�, and role="math" localid="1654239338245" 41.0鈭�when projected on a diffraction grating having 10,000 lines per centimeter? Explicitly show how you follow the steps in Problem-Solving Strategies for Wave Optics.
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