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Chapter 33: Q. 31 (page 956)

Moving mirror M2of a Michelson interferometer a distance of 100μmcauses500bright-dark-bright fringe shifts. What is the wavelength of the light?

Short Answer

Expert verified

Wavelength of the light is400nm

Step by step solution

01

Wavelength

The wavelength of a waveform signal conveyed in space or down a wire is the distance between identical points (consecutive crests) in adjacent cycles.

This length is commonly stated in meters (m), centimeters (cm), or millimeters (mm) in wireless systems (mm).

02

Find Wavelength

The wavelength utilized in the Michelson interferometer experiment can be expressed as

Δm=2ΔLλ

⇒λ=2ΔLΔm

In our numerical example, we have

λ=2×1×10-4m500

=4×10-7m

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Most popular questions from this chapter

A Michelson interferometer uses red light with a wavelength of 656.45nm from a hydrogen discharge lamp. How many bright-dark-bright fringe shifts are observed if mirror M2 is moved exactly 1cm?

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