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Q. 24

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 956

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Short Answer

A laser beam with a wavelength of illuminates two -wide slits separated by . The interference pattern is observed on a screen behind the slits. What is the light intensity, as a fraction of the maximum intensity , at a point halfway between the center and the first minimum?

Light Intensity,

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Step by Step Solution

Step1: Introduction

The strength or amount of light produced by a certain lighting source is referred to as light intensity. It is a power measurement of a light source that is wavelength-weighted..

Step2: Find Light Intensity 

The following equation gives the total double-slit intensity:

We must first locate the midway point between the center and the first minimum in order to find as a function , To do so, we can use the following equation to explain the position of dark fringes:

The first minimum's position is

And the halfway point is at half of this number, implying that

Step3: Find Light Intensity 

Substitute the values,

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