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Chapter 33: Q. 10 (page 954)

A Michelson interferometer is set up to display constructive interference (a bright central spot in the fringe pattern of Figure) using light of wavelength l. If the wavelength is changed to 位/2, does the central spot remain bright, does the central spot become dark, or do the fringes disappear? Explain. Assume the fringes are viewed by a detector sensitive to both wavelengths.

Short Answer

Expert verified

The brightness of the central maxima will be maintained.

Step by step solution

01

Introduction

Fringe is the alternately light and dark band that forms as a result of interference. When two light waves collide, destructive and constructive interference is created. Constructive interference causes the brilliant band, while interference causes the dark band.

02

Explanation

Because there is no phase difference at the central spot, even if the wavelength is hung, the central maxima will stay unaltered. When estimating the intensity of the centre maxima, the wavelength variation is not regarded in any way.

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