c) In a Young's double slit experiment, light of frequency 4.85 x 10¹4 Hz passes through a narrow single slit and is then incident on two very narrow, closely spaced, parallel slits. A screen is placed 1.60 m from the double slit arrangement and bright interference fringes are visible on the screen. The distance across 20 fringe spacings is 90.5 mm. Determine the spacing of the double slits. If the distance between the double slits and screen is reduced to 1.15 m, determine the spacing between adjacent dark fringes. i. ii. iii. If the monochromatic light source is replaced by an intense white light source, describe the appearance of the bright fringes closest to the centre of the screen.

c) In a Young's double slit experiment, light of frequency 4.85 x 10¹4 Hz passes through a narrow single slit and is then incident on two very narrow, closely spaced, parallel slits. A screen is placed 1.60 m from the double slit arrangement and bright interference fringes are visible on the screen. The distance across 20 fringe spacings is 90.5 mm. Determine the spacing of the double slits. If the distance between the double slits and screen is reduced to 1.15 m, determine the spacing between adjacent dark fringes. i. ii. iii. If the monochromatic light source is replaced by an intense white light source, describe the appearance of the bright fringes closest to the centre of the screen.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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

d)
Two loud speakers are connected to the same frequency source and are
positioned facing each other on the opposite sides of a large room. They
are each emitting a sound wave of frequency 180 Hz.
A small microphone is connected to some headphones and is held
between the speakers. As the microphone is moved in a straight line
between the speakers a gradual rise and fall in intensity is heard on the
headphones.
i. Explain why the intensity will rise and fall.
If the distance between the loudest sounds is 0.90 m, determine the
wavelength of the sound waves.
Determine the velocity of sound from these results.
ii.
iii.

c)
In a Young's double slit experiment, light of frequency 4.85 x 10¹4 Hz
passes through a narrow single slit and is then incident on two very
narrow, closely spaced, parallel slits. A screen is placed 1.60 m from the
double slit arrangement and bright interference fringes are visible on the
screen. The distance across 20 fringe spacings is 90.5 mm.
i. Determine the spacing of the double slits.
If the distance between the double slits and screen is reduced to
1.15 m, determine the spacing between adjacent dark fringes.
ii.
iii.
If the monochromatic light source is replaced by an intense white
light source, describe the appearance of the bright fringes closest to
the centre of the screen.

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true or false
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