Light from a helium-neon laser (λ� = 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.4 mm behind the slits. Twelve bright fringes are seen, spanning a distance of 54 mm. What is the spacing (in mm) between the slits?

Light from a helium-neon laser (λ� = 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.4 mm behind the slits. Twelve bright fringes are seen, spanning a distance of 54 mm. What is the spacing (in mm) between the slits?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter26: Electromagnetism

Section: Chapter Questions

Problem 69A

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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

the answer is not 478.27x10^-6 m

Light from a helium-neon laser (A-633 nm) is used to illuminate two
narrow slits. The interference pattern is observed on a screen 3.4 m behind
the slits. Twelve bright fringes are seen spanning a distance of 54 mm
Part A
What is the spacing (in mm) between the slits?
Express your answer in millimeters.
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