Answered: In black-and-white photography if one…

In black-and-white photography if one uses a red light of wavelength 648.0 nm in darkroom, its frequency (in Terahertz) is:

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

In black-and-white photography if one uses a red light of wavelength 648.0 nm in
darkroom, its frequency (in Terahertz) is:

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