7.Laser light of 530 nm falls upon parallel slits spaced 0.25 mm apart. How many totalbright fringes will appear in the interference pattern?8.Purple light (Go Wildcats!) has a wavelength of around 400 nm. At what speed will anelectron have the same wavelength as purple light?

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7. Laser light of 530 nm falls upon parallel slits spaced 0.25 mm apart. How many total bright fringes will appear in the interference pattern?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter27: Wave Optics

Section: Chapter Questions

Problem 60PE: (a) What is the minimum angular spread of a 633-nm wavelength He-Ne laser beam that is originally...

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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

7.
Laser light of 530 nm falls upon parallel slits spaced 0.25 mm apart. How many total
bright fringes will appear in the interference pattern?
8.
Purple light (Go Wildcats!) has a wavelength of around 400 nm. At what speed will an
electron have the same wavelength as purple light?

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