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What is the frequency of 650 nm of light?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter16: Fundamentals Of Light

Section: Chapter Questions

Problem 9STP

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

What is the frequency of 650 nm of light?
approximately 4.61x1014 Hz
A red laser emits a very narrow beam at a wavelength of approximately 650 nm (650x10-9m), which corresponds to a frequency of approximately 4.61x1014 Hz, which is a few hundred terahertz!

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