A hair is placed at one edge between two flat glass plates 7.51 cm long. When this arrangement is illuminated with 568 nm light, 121 bands are counted, starting at the point of contact of the two plates. How thick is the hair? Answer in units of m.

A hair is placed at one edge between two flat glass plates 7.51 cm long. When this arrangement is illuminated with 568 nm light, 121 bands are counted, starting at the point of contact of the two plates. How thick is the hair? Answer in units of m.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter36: Applications Of The Wave Model

Section: Chapter Questions

Problem 30PQ

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Concept explainers

Diffraction of light

In physics, the term diffraction is defined as the bending of light around the corners of the obstacle. As a light ray passes by an aperture, it bends around the edges or through slits, it spreads out through a narrow opening. The diffracted light will produce fringes of bright and dark or colored bands which are labeled as a diffraction pattern.

Question

A hair is placed at one edge between two
flat glass plates 7.51 cm long. When this
arrangement is illuminated with 568 nm light,
121 bands are counted, starting at the point
of contact of the two plates.
How thick is the hair?
Answer in units of m.

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